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US5799118A
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Integrated optical multiplexer-and-demultiplexer
Assignee: Toshiba Corp
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Filing: 1996-07-19
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Granted: 1998-08-25
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Expires: 2016-07-19
Abstract
Abstract An integrated optical multiplexer-and-demultiplexer comprising an arrayed waveguide having an optical delay portion imparting an optical band-pass characteristic, a lens secured to one end of the arrayed waveguide, and a diffraction grating opposing the lens. The optical delay portion is made of a light-transmitting medium selected from the group consisting of air and material composed of at least two substances exhibiting a minimum temperature coefficient to an optical length.
Inventors
- 👤 Masahiro Ogusu
- 👤 Shigeru Ohshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:30
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/12007; G02B6/12009; G02B6/12011; G02B6/24; G02B6/26; G02B6/28; G02B6/293; G02B6/29304; G02B6/29305; G02B6/2931; G02B2006/12083; G02B2006/12102; G02B2006/12109; G02B2006/12133; G02B2006/12159; G02B2006/12166; G02B2006/12195; G02B6/12026; G02B6/12028; G02B6/1203; G02B6/29346; G02B6/2935; G02B6/29352; G02B6/29361; G02B6/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
83 words
An integrated optical multiplexer-and-demultiplexer for use in wavelength multiplex optical communication, comprising: an arrayed waveguide; a lens secured to one end of said arrayed waveguide; a diffraction grating opposing said lens; an optical delay portion between said lens and said diffraction grating, which imparts an optical band-pass characteristic and which is made of one of air and a light-transmitting medium composed of substances exhibiting a minimum temperature coefficient to an optical length; and a cylindrical lens for collimating light emitted from said lens.
Claim 2
Dependent Claim
83 words
An integrated optical multiplexer-and-demultiplexer for use in wavelength multiplex optical communication, comprising: an arrayed waveguide; a lens secured to one end of said arrayed waveguide; a diffraction grating opposing said lens; an optical delay portion between said lens and said diffraction grating, which imparts an optical band-pass characteristic and which is made of one of air and a light-transmitting medium composed of substances exhibiting a minimum temperature coefficient to an optical length; and a cylindrical lens for collimating light emitted from said lens.
Claim 3
Dependent Claim
18 words
The multiplexer-and-demultiplexer according to claim 1, wherein said cylindrical lens is secured to an end of said lens.
Claim 4
Dependent Claim
19 words
The multiplexer-and-demultiplexer according to claim 1, wherein said cylindrical lens is held between said lens and said diffraction grating.
Claim 5
Dependent Claim
108 words
An optical multiplexer-and demultiplexer comprising: an arrayed waveguide device including a substrate, an array of waveguides provided on said substrate and having different lengths, at least one pair of input-output waveguide ports, and two-dimensional waveguides coupled with said input-output waveguide ports, respectively; and an optical delay portion located at a part of said array of waveguides and formed of light-transmitting medium imparting an optical band-pass characteristic and exhibiting a minimum temperature coefficient to an optical length, said light-transmitting medium being a temperature compensation region, said temperature compensation region being gradually narrowed in width in an array direction in which said waveguides of said array of waveguide are arrayed.
Claim 6
Dependent Claim
108 words
An optical multiplexer-and demultiplexer comprising: an arrayed waveguide device including a substrate, an array of waveguides provided on said substrate and having different lengths, at least one pair of input-output waveguide ports, and two-dimensional waveguides coupled with said input-output waveguide ports, respectively; and an optical delay portion located at a part of said array of waveguides and formed of light-transmitting medium imparting an optical band-pass characteristic and exhibiting a minimum temperature coefficient to an optical length, said light-transmitting medium being a temperature compensation region, said temperature compensation region being gradually narrowed in width in an array direction in which said waveguides of said array of waveguide are arrayed.
Claim 7
Dependent Claim
31 words
The multiplexer-and-demultiplexer according to claim 4, wherein said light-transmitting medium of said optical delay portion comprises a three-dimensional waveguide made of quartz-based material and a three-dimensional waveguide made of non-quartz-based material.
Claim 8
Dependent Claim
30 words
The integrated optical multiplexer-and-demultiplexer according to claim 4, wherein said light-transmitting medium of said optical delay portion comprises a recess formed in said substrate to form an air region therein.
Claim 9
Dependent Claim
15 words
The multiplexer-and-demultiplexer according to claim 4, wherein said temperature compensation region is formed of plastics.
Claim 10
Dependent Claim
18 words
The multiplexer-and-demultiplexer according to claim 4, wherein said temperature compensation region is made of glass other than quartz.
Claim 11
Dependent Claim
59 words
An integrated optical multiplexer-and-demultiplexer with a Mach-Zehnder filter for use in wavelength multiplex optical communication, comprising: at least two input-output waveguide ports arranged on both sides of a substrate, respectively, and at least two waveguides provided on said substrate and having different lengths; and a temperature compensation region which is provided at a part of one of said waveguides.
Claim 12
Dependent Claim
59 words
An integrated optical multiplexer-and-demultiplexer with a Mach-Zehnder filter for use in wavelength multiplex optical communication, comprising: at least two input-output waveguide ports arranged on both sides of a substrate, respectively, and at least two waveguides provided on said substrate and having different lengths; and a temperature compensation region which is provided at a part of one of said waveguides.
Claim 13
Dependent Claim
22 words
The multiplexer-and-demultiplexer according to claim 9, wherein said temperature compensation region comprises a concave formed in said substrate and filled with air.
Claim 14
Dependent Claim
15 words
The multiplexer-and-demultiplexer according to claim 9, wherein said temperature compensation region is formed of resin.
Claim 15
Dependent Claim
21 words
The multiplexer-and-demultiplexer according to claim 9, wherein said one for said temperature compensation region is formed of glass other than quartz.
References Cited (Backward Citations)
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