EP0463569A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Semiconductor optical amplifying apparatus
Assignee: Canon Inc
•
Filing: 1991-06-20
•
Granted: —
•
Expires: 2011-06-20
Abstract
Abstract A semiconductor optical amplifying apparatus includes: a substrate; an active layer having a quantum well structure formed on the substrate, the active layer guiding first waveguide mode light and second waveguide mode light having a polarization direction perpendicular to that of the first waveguide mode light and amplifying the first waveguide mode light and the second waveguide mode light, the active layer having quantum wells such that projected quantization axes obtained by projecting quantization axes of the quantum wells thereof on a plane perpendicular to a light waveguide direction are inclined at 45 DEG with respect to vibration directions of electric field vectors of the first waveguide mode light and the second waveguide mode light; and an electrode for supplying a current to the active layer. <IMAGE>
Inventors
- 👤 Michiyo C/O Canon K.K. Nishimura
- 👤 Jun C/O Canon K.K. Nitta
- 👤 Kenji c/o Canon K.K. Nakamura
- 👤 Masao C/O Canon K.K. Majima
- 👤 Toru c/o Canon K.K. Nakata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 16:50
CPC Classifications
B; B82; B82Y; B82Y20/00; H; H01; H01S; H01S5/00; H01S5/02; H01S5/026; H01S5/30; H01S5/34; H01S5/50; H01S5/5009; H04; H04B; H04B10/00; H04B10/29; H04B10/291; H04B10/2912; H04B10/2914; H01S2301/00; H01S2301/14; H01S5/32; H01S5/3202; H01S5/3203
Claims Analysis
Total Claims: 80
Claim 1
Independent Claim
125 words
A semiconductor optical amplifying apparatus, comprising: a substrate; an active layer having a quantum well structure formed on said substrate, said active layer guiding first waveguide mode light and second waveguide mode light having a polarization direction perpendicular to that of the first waveguide mode light and amplifying the first waveguide mode light and the second waveguide mode light, said active layer having quantum wells such that projected quantization axes obtained by projecting quantization axes of the quantum wells thereof on a plane perpendicular to a light waveguide direction are inclined at 45 with respect to vibration directions of electric field vectors of the first waveguide mode light and the second waveguide mode light; and an electrode for supplying a current to said active layer.
Claim 2
Dependent Claim
125 words
A semiconductor optical amplifying apparatus, comprising: a substrate; an active layer having a quantum well structure formed on said substrate, said active layer guiding first waveguide mode light and second waveguide mode light having a polarization direction perpendicular to that of the first waveguide mode light and amplifying the first waveguide mode light and the second waveguide mode light, said active layer having quantum wells such that projected quantization axes obtained by projecting quantization axes of the quantum wells thereof on a plane perpendicular to a light waveguide direction are inclined at 45 with respect to vibration directions of electric field vectors of the first waveguide mode light and the second waveguide mode light; and an electrode for supplying a current to said active layer.
Claim 3
Dependent Claim
17 words
An apparatus according to claim 1, wherein said active layer comprises a plurality of cyclically arranged portions.
Claim 4
Dependent Claim
69 words
An apparatus according to claim 2, wherein said active layer comprises a first plurality of portions having parallel projected quantization axes, and a second plurality of portions having projected quantization axes which are inclined at 45° with respect to vibration directions of electric field vectors in the first waveguide mode light and the second waveguide mode light and which are perpendicular to those of said first plurality of portions.
Claim 5
Dependent Claim
26 words
An apparatus according to claim 1, wherein the first waveguide mode light comprises TE mode light, and the second waveguide mode light comprises TM mode light.
Claim 6
Dependent Claim
59 words
An apparatus according to claim 1, further comprising a first cladding layer formed between said substrate and said active layer, and a second cladding layer formed on said active layer, said first cladding layer having a three-dimensional pattern constituted by a plurality of surfaces, and said active layer being formed on at least some of said plurality of surfaces.
Claim 7
Dependent Claim
30 words
An apparatus according to claim 1, wherein said active layer comprises a plurality of quantum well layers and a plurality of barrier layers, which are alternately stacked on each other.
Claim 8
Dependent Claim
40 words
An optical communication system comprising a transmitter, a receiver, a transmission line for connecting said transmitter and receiver, and an optical amplifying apparatus recited in claim 1 which is disposed in at least one location of said transmitter and receiver.
Claim 9
Dependent Claim
50 words
An optical communication system comprising transmitter, a receiver, a repeater equipment, a transmission line for connecting said transmitter and receiver through said repeater equipment, and an optical amplifying apparatus recited in claim 1 which is disposed in at least one location of said transmitter and receiver and said repeater equipment.
Claim 10
Dependent Claim
37 words
A bidirectional optical communication system comprising a plurality of transceivers, a transmission line for connecting said transceivers and an optical amplifying apparatus recited in claim 1 which is disposed in at least one location of said transceivers.
Claim 11
Dependent Claim
48 words
A bidirectional optical communication system comprising a plurality of transceivers, a repeater equipment, a transmission line for connecting said transceivers through said repeater equipment, and an optical amplifying apparatus recited in claim 1 which is disposed in at least one location of said transceivers and said repeater equipment.
Claim 12
Dependent Claim
79 words
A bus-type optical communication network comprising a plurality of terminals, a plurality of transceivers respectively connected to said terminals to perform optical communication among said terminals, at least one transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 1 which is disposed in at least one location on a light transmitting path from a light transmit part of any one of said transceivers to a light receive part of any one of said transceivers.
Claim 13
Dependent Claim
95 words
An active bus-type optical communication network comprising a plurality of terminals; a plurality of optical nodes each of which includes, at least, plural means for transmitting light signal, plural means for receiving light signal and means for controlling communication; a transmission line for connecting said optical nodes; and an optical amplifying apparatus recited in claim 1 which is disposed in at least one location on a light transmitting path from said light signal transmitting means in any one of said optical nodes to said light signal receiving means in any one of said optical nodes.
Claim 14
Dependent Claim
59 words
A star-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a star coupler, a transmission line for connecting said star coupler to said transceivers, and an optical amplifying apparatus recited in claim 1 which is disposed in at least one location on a light transmitting path.
Claim 15
Dependent Claim
52 words
A loop-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 1 which is disposed in at least one location on a light transmitting path.
Claim 16
Dependent Claim
52 words
An integrated optical node comprising a semiconductor substrate, a channel waveguide formed on said substrate for connecting transmission lines, an optical amplifying apparatus recited in claim 1 which is fabricated in said channel waveguide, and an optical coupler for coupling at least one of light transmitter and receiver to the transmission line.
Claim 17
Dependent Claim
141 words
A semiconductor optical amplifying apparatus, comprising: a substrate; an active layer having a quantum well structure formed on said substrate, said active layer guiding first waveguide mode light and second waveguide mode light having a polarization direction perpendicular to that of the first waveguide mode light and amplifying the first waveguide mode light and the second waveguide mode light, said active layer having a plurality of portions having different projected quantization axes obtained by projecting quantization axes on a plane perpendicular to the light waveguide direction, and said plurality of portions being arranged such that a sum of gains applied from said plurality of portions to the first waveguide mode light is equal to a sum of gains applied from said plurality of portions to the second waveguide mode light; and an electrode for supplying a current to said active layer.
Claim 18
Dependent Claim
141 words
A semiconductor optical amplifying apparatus, comprising: a substrate; an active layer having a quantum well structure formed on said substrate, said active layer guiding first waveguide mode light and second waveguide mode light having a polarization direction perpendicular to that of the first waveguide mode light and amplifying the first waveguide mode light and the second waveguide mode light, said active layer having a plurality of portions having different projected quantization axes obtained by projecting quantization axes on a plane perpendicular to the light waveguide direction, and said plurality of portions being arranged such that a sum of gains applied from said plurality of portions to the first waveguide mode light is equal to a sum of gains applied from said plurality of portions to the second waveguide mode light; and an electrode for supplying a current to said active layer.
Claim 19
Dependent Claim
103 words
An apparatus according to claim 16, wherein said active layer comprises a first plurality of portions having projected quantization axes which are inclined at 45 with respect to vibration directions of electric field vectors of the first waveguide mode light and the second waveguide mode light and which are parallel to each other, and a second plurality of portions having projected quantization axes which are inclined at 45° with respect to the vibration directions of the electric field vectors of the first waveguide mode light and the second waveguide mode light and which are perpendicular to those of said first plurality of portions.
Claim 20
Dependent Claim
62 words
An apparatus according to claim 16, wherein said active layer comprises a first plurality of portions having a projected quantization axis parallel to a vibration direction of an electric field vector of the first waveguide mode and a second plurality of portions having a projected quantization axis parallel to a vibration direction of an electric field vector of the second waveguide mode.
Claim 21
Dependent Claim
26 words
An apparatus according to claim 16, wherein the first waveguide mode light comprises TE mode light, and the second waveguide mode light comprises TM mode light.
Claim 22
Dependent Claim
59 words
An apparatus according to claim 16, further comprising a first cladding layer formed between said substrate and said active layer, and a second cladding layer formed on said active layer, said first cladding layer having a three-dimensional pattern constituted by a plurality of surfaces, and said active layer being formed on at least some of said plurality of surfaces.
Claim 23
Dependent Claim
30 words
An apparatus according to claim 16, wherein said active layer comprises a plurality of quantum well layers and a plurality of barrier layers, which are alternately stacked on each other.
Claim 24
Dependent Claim
40 words
An optical communication system comprising a transmitter, a receiver, a transmission line for connecting said transmitter and receiver, and an optical amplifying apparatus recited in claim 16 which is disposed in at least one location of said transmitter and receiver.
Claim 25
Dependent Claim
51 words
An optical communication system comprising a transmitter, a receiver, a repeater equipment, a transmission line for connecting said transmitter and receiver through said repeater equipment, and an optical amplifying apparatus recited in claim 16 which is disposed in at least one location of said transmitter and receiver and said repeater equipment.
Claim 26
Dependent Claim
38 words
A bidirectional optical communication system comprising a plurality of a transceivers, a transmission line for connecting said transceivers and an optical amplifying apparatus recited in claim 16 which is disposed in at least one location of said transceivers.
Claim 27
Dependent Claim
48 words
A bidirectional optical communication system comprising a plurality of transceivers, a repeater equipment, a transmission line for connecting said transceivers through said repeater equipment, and an optical amplifying apparatus recited in claim 16 which is disposed in at least one location of said transceivers and said repeater equipment.
Claim 28
Dependent Claim
79 words
A bus-type optical communication network comprising a plurality of terminals, a plurality of transceivers respectively connected to said terminals to perform optical communication among said terminals, at least one transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 16 which is disposed in at least one location on a light transmitting path from a light transmit part of any one of said transceivers to a light receive part of any one of said transceivers.
Claim 29
Dependent Claim
95 words
An active bus-type optical communication network comprising a plurality of terminals; a plurality of optical nodes each of which includes, at least, plural means for transmitting light signals, plural means for receiving light signal and means for controlling communication; a transmission line for connecting said optical nodes; and an optical amplifying apparatus recited in claim 16 which is disposed in at least one location on a light transmitting path from said light signal transmitting means in any one of said optical nodes to said light signal receiving means in any one of said optical nodes.
Claim 30
Dependent Claim
59 words
A star-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a star coupler, a transmission line for connecting said star coupler to said transceivers, and an optical amplifying apparatus recited in claim 16 which is disposed in at least one location on a light transmitting path.
Claim 31
Dependent Claim
52 words
A loop-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 16 which is disposed in at least one location on a light transmitting path.
Claim 32
Dependent Claim
52 words
An integrated optical node comprising a semiconductor substrate, a channel waveguide formed on said substrate for connecting transmission lines, an optical amplifying apparatus recited in claim 16 which is fabricated in said channel waveguide, and an optical coupler for coupling at least one of light transmitter and receiver to the transmission line.
Claim 33
Dependent Claim
111 words
A semiconductor optical amplifying apparatus comprising: a substrate; an active layer having a quantum well layer and a barrier layer alternately formed on said substrate, said active layer guiding first waveguide mode light and second waveguide mode light having a polarization direction perpendicular to that of the first waveguide mode light and amplifying the first waveguide mode light and the second waveguide mode light, and said quantum well layer having a layer surface inclined at an angle of 45° with respect to vibration directions of electric field vectors of the first waveguide mode light and the second waveguide mode light; and an electrode for supplying a current to said active layer.
Claim 34
Dependent Claim
111 words
A semiconductor optical amplifying apparatus comprising: a substrate; an active layer having a quantum well layer and a barrier layer alternately formed on said substrate, said active layer guiding first waveguide mode light and second waveguide mode light having a polarization direction perpendicular to that of the first waveguide mode light and amplifying the first waveguide mode light and the second waveguide mode light, and said quantum well layer having a layer surface inclined at an angle of 45° with respect to vibration directions of electric field vectors of the first waveguide mode light and the second waveguide mode light; and an electrode for supplying a current to said active layer.
Claim 35
Dependent Claim
17 words
An apparatus according to claim 31, wherein said active layer comprises a plurality of cyclically arranged portions.
Claim 36
Dependent Claim
86 words
An apparatus according to claim 32, wherein said active layer comprises a first plurality of portions having quantum well layers whose surfaces are parallel to each other, and a second plurality of portions having quantum well layers whose surfaces are inclined at 45 with respect to vibration directions of electric field vectors of the first waveguide mode light and the second waveguide mode light, and said second plurality of portions having quantum well layers whose surfaces are perpendicular to those of said first plurality of portions.
Claim 37
Dependent Claim
26 words
An apparatus according to claim 31, wherein the first waveguide mode light comprises TE mode light, and the second waveguide mode light comprises TM mode light.
Claim 38
Dependent Claim
59 words
An apparatus according to claim 31, further comprising a first cladding layer formed between said substrate and said active layer, and a second cladding layer formed on said active layer, said first cladding layer having a three-dimensional pattern constituted by a plurality of surfaces, and said active layer being formed on at least some of said plurality of surfaces.
Claim 39
Dependent Claim
40 words
An optical communication system comprising a transmitter, a receiver, a transmission line for connecting said transmitter and receiver, and an optical amplifying apparatus recited in claim 31 which is disposed in at least one location of said transmitter and receiver.
Claim 40
Dependent Claim
50 words
An optical communication system comprising transmitter, a receiver, a repeater equipment, a transmission line for connecting said transmitter and receiver through said repeater equipment, and an optical amplifying apparatus recited in claim 31 which is disposed in at least one location of said transmitter and receiver and said repeater equipment.
Claim 41
Dependent Claim
37 words
A bidirectional optical communication system comprising a plurality of transceivers, a transmission line for connecting said transceivers and an optical amplifying apparatus recited in claim 31 which is disposed in at least one location of said transceivers.
Claim 42
Dependent Claim
48 words
A bidirectional optical communication system comprising a plurality of transceivers, a repeater equipment, a transmission line for connecting said transceivers through said repeater equipment, and an optical amplifying apparatus recited in claim 31 which is disposed in at least one location of said transceivers and said repeater equipment.
Claim 43
Dependent Claim
79 words
A bus-type optical communication network comprising a plurality of terminals, a plurality of transceivers respectively connected to said terminals to perform optical communication among said terminals, at least one transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 31 which is disposed in at least one location on a light transmitting path from a light transmit part of any one of said transceivers to a light receive part of any one of said transceivers.
Claim 44
Dependent Claim
95 words
An active bus-type optical communication network comprising a plurality of terminals; a plurality of optical nodes each of which includes, at least, plural means for transmitting light signal, plural means for receiving light signal and means for controlling communication; a transmission line for connecting said optical nodes; and an optical amplifying apparatus recited in claim 31 which is disposed in at least one location on a light transmitting path from said light signal transmitting means in any one of said optical nodes to said light signal receiving means in any one of said optical nodes.
Claim 45
Dependent Claim
59 words
A star-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a star coupler, a transmission line for connecting said star coupler to said transceivers, and an optical amplifying apparatus recited in claim 31 which is disposed in at least one location on a light transmitting path.
Claim 46
Dependent Claim
52 words
A loop-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 31 which is disposed in an least one location on a light transmitting path.
Claim 47
Dependent Claim
52 words
An integrated optical node comprising a semiconductor substrate, a channel waveguide formed on said substrate for connecting transmission lines, an optical amplifying apparatus recited in claim 31 which is fabricated in said channel waveguide, and an optical coupler for coupling at least one of light transmitter and receiver to the transmission line.
Claim 48
Dependent Claim
137 words
A semiconductor optical amplifying apparatus comprising: a substrate; an active layer having a quantum well layer and a barrier layer alternately formed on said substrate, said active layer guiding first waveguide mode light and second waveguide mode light having a polarization direction perpendicular to that of the first waveguide mode light and amplifying the first waveguide mode light and the second waveguide mode light, said active layer having a plurality of portions whose quantum well layers are not parallel to each other, and said plurality of portions being arranged such that a sum of gains applied from said plurality of portions to the first waveguide mode light is equal to a sum of gains applied from said plurality of portions to the second waveguide mode light; and an electrode for supplying a current to said active layer.
Claim 49
Dependent Claim
137 words
A semiconductor optical amplifying apparatus comprising: a substrate; an active layer having a quantum well layer and a barrier layer alternately formed on said substrate, said active layer guiding first waveguide mode light and second waveguide mode light having a polarization direction perpendicular to that of the first waveguide mode light and amplifying the first waveguide mode light and the second waveguide mode light, said active layer having a plurality of portions whose quantum well layers are not parallel to each other, and said plurality of portions being arranged such that a sum of gains applied from said plurality of portions to the first waveguide mode light is equal to a sum of gains applied from said plurality of portions to the second waveguide mode light; and an electrode for supplying a current to said active layer.
Claim 50
Dependent Claim
101 words
An apparatus according to claim 45, wherein said active layer comprises a first plurality of portions having quantum well layers whose surfaces are inclined at 45° with respect to vibration directions of electric field vectors of the first waveguide mode light and the second waveguide mode light and are parallel to each other, and a second plurality of portions having quantum well layers whose surfaces are inclined at 45° with respect to the vibration directions of the electric field vectors of the first waveguide mode and the second waveguide mode and are perpendicular to those of said first plurality of portions.
Claim 51
Dependent Claim
68 words
An apparatus according to claim 45, wherein said active layer comprises a first plurality of portions having quantum well layers whose surfaces are parallel to a vibration direction of an electric field vector of the first waveguide mode light and a second plurality of portions having quantum well layers whose surfaces are parallel to the vibration direction of the electric field vector of the second waveguide mode light.
Claim 52
Dependent Claim
26 words
An apparatus according to claim 45, wherein the first waveguide mode light comprises TE mode light, and the second waveguide mode light comprises TM mode light.
Claim 53
Dependent Claim
59 words
An apparatus according to claim 45, further comprising a first cladding layer formed between said substrate and said active layer, and a second cladding layer formed on said active layer, said first cladding layer having a three-dimensional pattern constituted by a plurality of surfaces, and said active layer being formed on at least some of said plurality of surfaces.
Claim 54
Dependent Claim
40 words
An optical communication system comprising a transmitter, a receiver, a transmission line for connecting said transmitter and receiver, and an optical amplifying apparatus recited in claim 45 which is disposed in at least one location of said transmitter and receiver.
Claim 55
Dependent Claim
51 words
An optical communication system comprising a transmitter, a receiver, a repeater equipment, a transmission line for connecting said transmitter and receiver through said repeater equipment, and an optical amplifying apparatus recited in claim 45 which is disposed in at least one location of said transmitter and receiver and said repeater equipment.
Claim 56
Dependent Claim
37 words
A bidirectional optical communication system comprising a plurality of transceivers, a transmission line for connecting said transceivers and an optical amplifying apparatus recited in claim 45 which is disposed in at least one location of said transceivers.
Claim 57
Dependent Claim
48 words
A bidirectional optical communication system comprising a plurality of transceivers, a repeater equipment, a transmission line for connecting said transceivers through said repeater equipment, and an optical amplifying apparatus recited in claim 45 which is disposed in at least one location of said transcievers and said repeater equipment.
Claim 58
Dependent Claim
79 words
A bus-type optical communication network comprising a plurality of terminals, a plurality of transceivers respectively connected to said terminals to perform optical communication among said terminals, at least one transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 45 which is disposed in at least one location on a light transmitting path from a light transmit part of any one of said transceivers to a light receive part of any one of said transceivers.
Claim 59
Dependent Claim
95 words
An active bus-type optical communication network comprising a plurality of terminals; a plurality of optical nodes each of which includes, at least, plural means for transmitting light signal, plural means for receiving light signal and means for controlling communication; a transmission line for connecting said optical nodes; and an optical amplifying apparatus recited in claim 45 which is disposed in at least one location on a light transmitting path from said light signal transmitting means in any one of said optical nodes to said light signal receiving means in any one of said optical nodes.
Claim 60
Dependent Claim
59 words
A star-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a star coupler, a transmission line for connecting said star coupler to said transceivers, and an optical amplifying apparatus recited in claim 45 which is disposed in at least one location on a light transmitting path.
Claim 61
Dependent Claim
52 words
A loop-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 45 which is disposed in at least one location on a light transmitting path.
Claim 62
Dependent Claim
52 words
An integrated optical node comprising a semiconductor substrate, a channel waveguide formed on said substrate for connecting transmission lines, an optical amplifying apparatus recited in claim 45 which is fabricated in said channel waveguide, and an optical coupler for coupling at least one of light transmitter and receiver to the transmission line.
Claim 63
Dependent Claim
138 words
A semiconductor optical amplifying apparatus for waveguiding light and amplifying waveguided light, comprising: a substrate consisting of a semiconductor of a first conductivity type and having a flat surface; a first cladding layer formed on said flat surface of said substrate and consisting of a semiconductor of the first conductivity type, said first cladding layer having an upper side constituted by cyclic projections in a direction perpendicular to the light waveguide direction, and said cyclic projections being constituted by a plurality of nonparallel surfaces; a semiconductor active layer having a quantum well structure formed on said cyclic projections of said first cladding layer; a second cladding layer formed on said active layer and consisting of a semiconductor of a second conductivity type; a first electrode formed on said second cladding layer; and a second electrode contacting said substrate.
Claim 64
Dependent Claim
138 words
A semiconductor optical amplifying apparatus for waveguiding light and amplifying waveguided light, comprising: a substrate consisting of a semiconductor of a first conductivity type and having a flat surface; a first cladding layer formed on said flat surface of said substrate and consisting of a semiconductor of the first conductivity type, said first cladding layer having an upper side constituted by cyclic projections in a direction perpendicular to the light waveguide direction, and said cyclic projections being constituted by a plurality of nonparallel surfaces; a semiconductor active layer having a quantum well structure formed on said cyclic projections of said first cladding layer; a second cladding layer formed on said active layer and consisting of a semiconductor of a second conductivity type; a first electrode formed on said second cladding layer; and a second electrode contacting said substrate.
Claim 65
Dependent Claim
57 words
An apparatus according to claim 59, wherein said projections of said first cladding layer comprise a first plurality of surfaces inclined at 45 with respect to a surface of said substrate, and a second plurality of surfaces perpendicular to the surface of said substrate, and said active layer is formed on only said first plurality of surfaces.
Claim 66
Dependent Claim
54 words
An apparatus according to claim 59, wherein said projections of said first cladding layer comprise a first plurality of surfaces inclined at 45 with respect to a surface of said substrate and parallel to each other, and a second plurality of surfaces perpendicular to said first plurality of surfaces and parallel to each other.
Claim 67
Dependent Claim
45 words
An apparatus according to claim 59, wherein said projections of said first cladding layer comprise a first plurality of surfaces having a rectangular section and perpendicular to a surface of said substrate, and a second plurality of surfaces parallel to the surface of said substrate.
Claim 68
Dependent Claim
47 words
An apparatus according to claim 59, wherein said projections of said first cladding layer comprise a first plurality of surfaces having a trapezoidal section and perpendicular to a surface of said substrate, and a second plurality of surfaces inclined with respect to the surface of said substrate.
Claim 69
Dependent Claim
30 words
An apparatus according to claim 59, wherein said substrate essentially consists of n-GaAs, said first cladding layer essentially consists of n-AIGaAs, and said second cladding layer essentially consists of p-AIGaAs.
Claim 70
Dependent Claim
33 words
An apparatus according to claim 64, wherein said active layer comprises a plurality of nondoped GaAs quantum well layers and a plurality of AIGaAs barrier layers, which are alternately stacked on each other.
Claim 71
Dependent Claim
56 words
An apparatus according to claim 59, further comprising a buffer layer essentially consisting of a semiconductor of a first conductivity type and formed between said substrate and said first cladding layer, and a capping layer essentially consisting of a semiconductor of a second conductivity type and formed between said second cladding layer and said first electrode.
Claim 72
Dependent Claim
40 words
An optical communication system comprising a transmitter, a receiver, a transmission line for connecting said transmitter and receiver, and an optical amplifying apparatus recited in claim 59 which is disposed in at least one location of said transmitter and receiver.
Claim 73
Dependent Claim
51 words
An optical communication system comprising a transmitter, a receiver, a repeater equipment, a transmission line for connecting said transmitter and receiver through said repeater equipment, and an optical amplifying apparatus recited in claim 59 which is disposed in at least one location of said transmitter and receiver and said repeater equipment.
Claim 74
Dependent Claim
37 words
A bidirectional optical communication system comprising a plurality of transceivers, a transmission line for connecting said transceivers and an optical amplifying apparatus recited in claim 59 which is disposed in at least one location of said transceivers.
Claim 75
Dependent Claim
48 words
A bidirectional optical communication system comprising a plurality of transceivers, a repeater equipment, a transmission line for connecting said transceivers through said repeater equipment, and an optical amplifying apparatus recited in claim 59 which is disposed in at least one location of said transceivers and said repeater equipment.
Claim 76
Dependent Claim
79 words
A bus-type optical communication network comprising a plurality of terminals, a plurality of transceivers respectively connected to said terminals to perform optical communication among said terminals, at least one transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 59 which is disposed in at least one location on a light transmitting path from a light transmit part of any one of said transceivers to a light receive part of any one of said transceivers.
Claim 77
Dependent Claim
95 words
An active bus-type optical communication network comprising a plurality of terminals; a plurality of optical nodes each of which includes, at least, plural means for transmitting light signal, plural means for receiving light signal and means for controlling communication; a transmission line for connecting said optical nodes; and an optical amplifying apparatus recited in claim 59 which is disposed in at least one location on a light transmitting path from said light signal transmitting means in any one of said optical nodes to said light signal receiving means in any one of said optical nodes.
Claim 78
Dependent Claim
59 words
A star-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a star coupler, a transmission line for connecting said star coupler to said transceivers, and an optical amplifying apparatus recited in claim 59 which is disposed in at least one location on a light transmitting path.
Claim 79
Dependent Claim
52 words
A loop-type optical communication network comprising a plurality of transceivers each of which includes a light transmit part and a light receive part, a transmission line for connecting said transceivers, and an optical amplifying apparatus recited in claim 59 which is disposed in at least one location on a light transmitting path.
Claim 80
Dependent Claim
52 words
An integrated optical node comprising a semiconductor substrate, a channel waveguide formed on said substrate for connecting transmission lines, an optical amplifying apparatus recited in claim 59 which is fabricated in said channel waveguide, and an optical coupler for coupling at least one of light transmitter and receiver to the transmission line.
References Cited (Backward Citations)
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