US5546481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single polarization fiber and amplifier
Assignee: RTX Corp
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Filing: 1995-03-02
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Granted: 1996-08-13
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Expires: 2015-03-02
Abstract
Abstract A single polarization fiber and/or amplifier includes a non-polarization preserving fiber 10 having a fiber grating tap 12 which has a predetermined length and strength (Δn/n) and is oriented at a predetermined angle θ and has a grating spacing D so as to couple-out of the fiber 10 a predetermined amount of one polarization 24 over a predetermined wavelength range of an input light 16 and pass the other polarization 28 as output light 26, the grating length being substantially the length of the fiber 10. Alternatively, all or a portion of the fiber 10 may be doped to form a polarization sensitive optical amplifier.
Inventors
- 👤 Gerald Meltz
- 👤 Gary A. Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:12
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/0675; G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/126
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A single polarization device, comprising: a non-polarization preserving solid optical waveguide which propagates light having polarization components along a first polarization mode and along a second polarization mode; a grating tap oriented at a predetermined angle, and having a predetermined grating spacing, grating length, and grating strength so as to couple-out of said waveguide a predetermined amount of said first polarization over a predetermined wavelength range and pass said second polarization as an output light from said waveguide, said output light being polarized substantially along said second polarization; and said grating length extending over substantially the entire length of said waveguide.
Claim 2
Dependent Claim
101 words
A single polarization device, comprising: a non-polarization preserving solid optical waveguide which propagates light having polarization components along a first polarization mode and along a second polarization mode; a grating tap oriented at a predetermined angle, and having a predetermined grating spacing, grating length, and grating strength so as to couple-out of said waveguide a predetermined amount of said first polarization over a predetermined wavelength range and pass said second polarization as an output light from said waveguide, said output light being polarized substantially along said second polarization; and said grating length extending over substantially the entire length of said waveguide.
Claim 3
Dependent Claim
17 words
The single polarization device of claim 1 wherein a portion of said waveguide comprises a gain medium.
Claim 4
Dependent Claim
15 words
The single polarization device of claim 2 wherein said gain medium comprises a rare-earth dopant.
Claim 5
Dependent Claim
14 words
The single polarization device of claim 1 wherein said waveguide comprises an optical fiber.
Claim 6
Dependent Claim
29 words
The single polarization device of claim 1 further comprising a pump signal within said waveguide which excites said gain medium, said gain medium emitting said light in said waveguide.
Claim 7
Dependent Claim
18 words
The single polarization device of claim 5 wherein said light emitted from said gain medium is broadband light.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-13 | 2000-02-12 | 2000-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-13 | 2004-02-12 | 2004-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-13 | 2008-02-12 | 2008-08-13 | $7700.00 | Window Closed / Lapsed |