US5119230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber coupler amplifier
Assignee: Alcatel Lucent NV
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Filing: 1991-05-02
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Granted: 1992-06-02
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Expires: 2011-05-02
Abstract
Abstract Conventional optical amplifiers for the amplification of optical signals propagating in an optical waveguide use a first light source for the production of pump light, by means of which an active laser substance is excited to a first energy level above its upper laser level. According to the invention, a second light source is used to excite the active laser substance to a second energy level that is above the first energy level. By doing so, spontaneous emission between the laser levels of the active laser substance is suppressed in favor of induced emission.
Inventors
- 👤 Thomas Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:48
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/094; H01S3/094003
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
138 words
An optical amplifier for amplifying an optical signal in an optical waveguide doped in at least one region with erbium (Er 3+ ) as an active laser substance (2), wherein a first light source (5) is provided for coupling a first pump light into the optical waveguide, and wherein the active laser substance (2) is excitable by the first pump light to a first energy level 4 I 11/12 (9) above an upper laser level 4 I 13/2 (10), characterized in that a second light source (7) is provided for coupling a second pump light into the optical waveguide, with the active laser substance (2) in the optical waveguide being excitable by the second pump light to a second energy level 2 H 11/2 or 4 F 5/2 (12) above the first energy level 4 I 11/2 (9).
Claim 2
Dependent Claim
138 words
An optical amplifier for amplifying an optical signal in an optical waveguide doped in at least one region with erbium (Er 3+ ) as an active laser substance (2), wherein a first light source (5) is provided for coupling a first pump light into the optical waveguide, and wherein the active laser substance (2) is excitable by the first pump light to a first energy level 4 I 11/12 (9) above an upper laser level 4 I 13/2 (10), characterized in that a second light source (7) is provided for coupling a second pump light into the optical waveguide, with the active laser substance (2) in the optical waveguide being excitable by the second pump light to a second energy level 2 H 11/2 or 4 F 5/2 (12) above the first energy level 4 I 11/2 (9).
Claim 3
Dependent Claim
59 words
An optical amplifier as claimed in claim 1, characterized in that it is a fiber amplifier, that the optical waveguide is a first optical fiber (1), and that at least one first fiber-optic coupler (3) is provided for coupling the first and second pump light from at least one second optical fiber (4) into the first optical fiber (1).
Claim 4
Dependent Claim
53 words
An optical amplifier as claimed in claim 2, characterized in that the second optical fiber (4) serves to transmit the first pump light, and that, to transmit the second pump light, a third optical fiber (8) is provided which is connected through a second fiber-optic coupler (6) to the second optical fiber (4).
Claim 5
Dependent Claim
38 words
An optical amplifier as claimed in claim 2, characterized in that, to transmit the second pump light, a third optical fiber (8) is provided which is connected through an additional fiber-optic coupler to the first optical fiber (1).
Claim 6
Dependent Claim
42 words
An optical amplifier as claimed in claim 2, characterized in that a third optical fiber (8) is provided for transmitting the second pump light, and that the first (1), second (4), and third optical fibers (8) are interconnected by a multiport coupler.
Claim 7
Dependent Claim
44 words
An optical amplifier as claimed in claim 2, characterized in that additional light sources are provided for generating pump light, with the active laser substance (2) being excitable by said pump light to energy levels above the first energy level 4 I 11/2 (9).
Claim 8
Dependent Claim
26 words
An optical amplifier as claimed in claim 2, characterized in that at least one of the two light sources (5, 7) is a laser light source.
Claim 9
Dependent Claim
195 words
An optical fiber amplifier for amplifying an optical signal in a first optical fiber (1) doped in at least one region with an active laser substance (2), wherein a first light source (5) is provided for coupling a first pump light into the optical waveguide, and wherein the active laser substance (2) is excitable by the first pump light to a first energy level (9) above an upper laser level (10), characterized in that a second light source (7) is provided for coupling a second pump light into the optical waveguide, with the active laser substance (2) in the optical waveguide being excitable by the second pump light to a second energy level (12) above the first energy level (9), that at least one first fiber-optic coupler (3) is provided for coupling the first and second pump light from at least one second optical fiber (4) into the first optical fiber (1), that the second optical fiber (4) serves to transmit the first pump light, and that, to transmit the second pump light, a third optical fiber (8) is provided which is connected through a second fiber-optic coupler (6) to the second optical fiber (4).
Claim 10
Dependent Claim
195 words
An optical fiber amplifier for amplifying an optical signal in a first optical fiber (1) doped in at least one region with an active laser substance (2), wherein a first light source (5) is provided for coupling a first pump light into the optical waveguide, and wherein the active laser substance (2) is excitable by the first pump light to a first energy level (9) above an upper laser level (10), characterized in that a second light source (7) is provided for coupling a second pump light into the optical waveguide, with the active laser substance (2) in the optical waveguide being excitable by the second pump light to a second energy level (12) above the first energy level (9), that at least one first fiber-optic coupler (3) is provided for coupling the first and second pump light from at least one second optical fiber (4) into the first optical fiber (1), that the second optical fiber (4) serves to transmit the first pump light, and that, to transmit the second pump light, a third optical fiber (8) is provided which is connected through a second fiber-optic coupler (6) to the second optical fiber (4).
Claim 11
Dependent Claim
42 words
An optical fiber amplifier as claimed in claim 8, characterized in that additional light sources are provided for generating pump light, with the active laser substance (2) being excitable by said pump light to energy levels above the first energy level (9).
Claim 12
Dependent Claim
26 words
An optical fiber amplifier as claimed in claim 8, characterized in that at least one of the two light sources (5,7) is a laser light source.
Claim 13
Dependent Claim
181 words
An optical fiber amplifier for amplifying an optical signal in a first optical fiber (1) doped in at least one region with an active laser substance (2), wherein a first light source (5) is provided for coupling a first pump light into the optical waveguide, and wherein the active laser substance (2) is excitable by the first pump light to a first energy level (9) above an upper laser level (10), characterized in that a second light source (7) is provided for coupling a second pump light into the optical waveguide, with the active laser substance (2) in the optical waveguide being excitable by the second pump light to a second energy level (12) above the first energy level (9), that at least one first fiber-optic coupler (3) is provided for coupling the first and second pump light from at least one second optical fiber (4) into the first optical fiber (1), and that, to transmit the second pump light, a third optical fiber (8) is provided which is connected through an additional fiber-optic coupler to the first optical fiber (1).
Claim 14
Dependent Claim
181 words
An optical fiber amplifier for amplifying an optical signal in a first optical fiber (1) doped in at least one region with an active laser substance (2), wherein a first light source (5) is provided for coupling a first pump light into the optical waveguide, and wherein the active laser substance (2) is excitable by the first pump light to a first energy level (9) above an upper laser level (10), characterized in that a second light source (7) is provided for coupling a second pump light into the optical waveguide, with the active laser substance (2) in the optical waveguide being excitable by the second pump light to a second energy level (12) above the first energy level (9), that at least one first fiber-optic coupler (3) is provided for coupling the first and second pump light from at least one second optical fiber (4) into the first optical fiber (1), and that, to transmit the second pump light, a third optical fiber (8) is provided which is connected through an additional fiber-optic coupler to the first optical fiber (1).
Claim 15
Dependent Claim
42 words
An optical fiber amplifier as claimed in claim 11, characterized in that additional light sources are provided for generating pump light, with the active laser substance (2) being excitable by said pump light to energy levels above the first energy level (9).
Claim 16
Dependent Claim
26 words
An optical fiber amplifier as claimed in claim 11, characterized in that at least one of the two light sources (5,7) is a laser light source.
Claim 17
Dependent Claim
184 words
An optical fiber amplifier for amplifying an optical signal in a first optical fiber (1) doped in at least one region with an active laser substance (2), wherein a first light source (5) is provided for coupling a first pump light into the optical waveguide, and wherein the active laser substance (2) is excitable by the first pump light to a first energy level (9) above an upper laser level (10), characterized in that a second light source (7) is provided for coupling a second pump light into the optical waveguide, with the active laser substance (2) in the optical waveguide being excitable by the second pump light to a second energy level (12) above the first energy level (9), that at least one first fiber-optic coupler (3) is provided for coupling the first and second pump light from at least one second optical fiber (4) into the first optical fiber (1), that a third optical fiber (8) is provided for transmitting the second pump light, and that the first (1), second (4), and third (8) optical fibers are interconnected by a multiport coupler.
Claim 18
Dependent Claim
184 words
An optical fiber amplifier for amplifying an optical signal in a first optical fiber (1) doped in at least one region with an active laser substance (2), wherein a first light source (5) is provided for coupling a first pump light into the optical waveguide, and wherein the active laser substance (2) is excitable by the first pump light to a first energy level (9) above an upper laser level (10), characterized in that a second light source (7) is provided for coupling a second pump light into the optical waveguide, with the active laser substance (2) in the optical waveguide being excitable by the second pump light to a second energy level (12) above the first energy level (9), that at least one first fiber-optic coupler (3) is provided for coupling the first and second pump light from at least one second optical fiber (4) into the first optical fiber (1), that a third optical fiber (8) is provided for transmitting the second pump light, and that the first (1), second (4), and third (8) optical fibers are interconnected by a multiport coupler.
Claim 19
Dependent Claim
42 words
An optical fiber amplifier as claimed in claim 14, characterized in that additional light sources are provided for generating pump light, with the active laser substance (2) being excitable by said pump light to energy levels above the first energy level (9).
Claim 20
Dependent Claim
26 words
An optical fiber amplifier as claimed in claim 14, characterized in that at least one of the two light sources (5,7) is a laser light source.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-02 | 1995-12-02 | 1996-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-02 | 1999-12-02 | 2000-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-02 | 2003-12-02 | 2004-06-02 | $7700.00 | Window Closed / Lapsed |