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Patent US5544271A successfully refreshed from Google Patents.
US5544271A
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US
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Nonlinear optical generator with index of refraction perturbed reflector arrangement
Assignee: Viavi Solutions Inc
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Filing: 1994-12-12
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Granted: 1996-08-06
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Expires: 2014-12-12
Abstract
Abstract A nonlinear optical generator which includes an optical fiber is described. The optical fiber has perturbations in the effective index of a mode guided by the same. These perturbations are simply provided as a multitude of transitions between the indices of refraction of the fiber, spaced along the path of radiation within the same.
Inventors
- 👤 Eric J. Lim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:27
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/10; H01S5/14; H01S5/146; H01S3/00; H01S3/10; H01S3/106; H01S3/108; H01S3/109
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
144 words
A nonlinear optical generator for producing output radiation having a desired frequency, said nonlinear optical generator comprising: (a) a source of radiation having one or more actual or potential frequencies including a selected frequency that can interact with a nonlinear optical material to produce therefrom, output radiation having said desired frequency; (b) a nonlinear material for receiving radiation from said source and producing at least partly therefrom, said output radiation having said desired frequency; and (c) an optical fiber positioned to receive radiation from said source, which fiber includes a multitude of transitions in the effective index of a mode guided by said fiber, said transitions being chosen to cause said source to provide radiation having said selected frequency, and wherein said nonlinear material is outside a laser cavity which includes both said source of radiation and at least part of said optical fiber.
Claim 2
Dependent Claim
144 words
A nonlinear optical generator for producing output radiation having a desired frequency, said nonlinear optical generator comprising: (a) a source of radiation having one or more actual or potential frequencies including a selected frequency that can interact with a nonlinear optical material to produce therefrom, output radiation having said desired frequency; (b) a nonlinear material for receiving radiation from said source and producing at least partly therefrom, said output radiation having said desired frequency; and (c) an optical fiber positioned to receive radiation from said source, which fiber includes a multitude of transitions in the effective index of a mode guided by said fiber, said transitions being chosen to cause said source to provide radiation having said selected frequency, and wherein said nonlinear material is outside a laser cavity which includes both said source of radiation and at least part of said optical fiber.
Claim 3
Dependent Claim
43 words
A nonlinear optical generator according to claim 1 wherein said multitude of transitions in the effective index of a guided mode in said fiber are caused by a multitude of transitions between indices of refraction spaced along the path of source radiation therein.
Claim 4
Dependent Claim
42 words
A nonlinear optical generator according to claim 1 wherein the selected source radiation generally has half the frequency of the desired output radiation, and said nonlinear material is selected to produce as said output radiation, the second harmonic of said source radiation.
Claim 5
Dependent Claim
33 words
A nonlinear optical generator according to claim 1 wherein said optical fiber is chosen to be polarization preserving and to support a single transverse mode of the selected radiation received from said source.
Claim 6
Dependent Claim
23 words
A nonlinear optical generator according to claim 1 wherein said nonlinear material includes a channel waveguide for receiving said radiation from said source.
Claim 7
Dependent Claim
28 words
A nonlinear optical generator according to claim 1 wherein said nonlinear material has sections of alternating spontaneous polarization to enable said output radiation to be provided via quasi-phasematching.
Claim 8
Dependent Claim
22 words
A nonlinear optical generator according to claim 1 wherein said fiber is positioned to transmit said selected frequency to said nonlinear material.
Claim 9
Dependent Claim
27 words
A nonlinear optical generator according to claim 1 wherein the periodicity of said transitions in said fiber varies along the path of source radiation in said fiber.
Claim 10
Dependent Claim
30 words
A nonlinear optical generator according to claim 8 wherein said periodicity of said transitions is reduced in space in the direction from which radiation from said source traverses the same.
Claim 11
Dependent Claim
55 words
A nonlinear optical generator according to claim 1 wherein said source is a semiconductor diode laser having a front facet which is provided with an anti-reflective coating suitable to reduce or eliminate internal lasing such that an optical cavity is defined to include said semiconductor diode laser and at least part of said optical fiber.
Claim 12
Dependent Claim
29 words
A nonlinear optical generator according to claim 10 wherein said nonlinear material is selected from the group consisting of LiNbO 3 , LiTaO 3 , and KTiOPO 4 .
Claim 13
Dependent Claim
136 words
A nonlinear optical generator for producing output radiation having a desired frequency, said nonlinear optical generator comprising: (a) a source of radiation having one or more actual or potential frequencies including a selected frequency that can interact with a nonlinear optical material to produce therefrom, output radiation having said desired frequency; (b) a nonlinear material for receiving radiation from said source and producing at least partly therefrom, said output radiation having said desired frequency; and (c) an optical fiber positioned to receive radiation from said source, which fiber includes a multitude of transitions in the effective index of a mode guided by said fiber, said transitions being chosen to cause said source to provide radiation having said selected frequency, and wherein said nonlinear material is positioned between said source and said transitions in said optical fiber.
Claim 14
Dependent Claim
136 words
A nonlinear optical generator for producing output radiation having a desired frequency, said nonlinear optical generator comprising: (a) a source of radiation having one or more actual or potential frequencies including a selected frequency that can interact with a nonlinear optical material to produce therefrom, output radiation having said desired frequency; (b) a nonlinear material for receiving radiation from said source and producing at least partly therefrom, said output radiation having said desired frequency; and (c) an optical fiber positioned to receive radiation from said source, which fiber includes a multitude of transitions in the effective index of a mode guided by said fiber, said transitions being chosen to cause said source to provide radiation having said selected frequency, and wherein said nonlinear material is positioned between said source and said transitions in said optical fiber.
Claim 15
Dependent Claim
43 words
A nonlinear optical generator according to claim 12 wherein said multitude of transitions in the effective index of a guided mode in said fiber are caused by a multitude of transitions between indices of refraction spaced along the path of source radiation therein.
Claim 16
Dependent Claim
42 words
A nonlinear optical generator according to claim 12 wherein the selected source radiation generally has half the frequency of the desired output radiation, and said nonlinear material is selected to produce as said output radiation, the second harmonic of said source radiation.
Claim 17
Dependent Claim
33 words
A nonlinear optical generator according to claim 12 wherein said optical fiber is chosen to be polarization preserving and to support a single transverse mode of the selected radiation received from said source.
Claim 18
Dependent Claim
23 words
A nonlinear optical generator according to claim 12 wherein said nonlinear material includes a channel waveguide for receiving said radiation from said source.
Claim 19
Dependent Claim
28 words
A nonlinear optical generator according to claim 12 wherein said nonlinear material has sections of alternating spontaneous polarization to enable said output radiation to be provided via quasi-phasematching.
Claim 20
Dependent Claim
27 words
A nonlinear optical generator according to claim 12 wherein the periodicity of said transitions in said fiber varies along the path of source radiation in said fiber.
Claim 21
Dependent Claim
30 words
A nonlinear optical generator according to claim 18 wherein said periodicity of said transitions is reduced in space in the direction from which radiation from said source traverses the same.
Claim 22
Dependent Claim
55 words
A nonlinear optical generator according to claim 12 wherein said source is a semiconductor diode laser having a front facet which is provided with an anti-reflective coating suitable to reduce or eliminate internal lasing such that an optical cavity is defined to include said semiconductor diode laser and at least part of said optical fiber.
Claim 23
Dependent Claim
29 words
A nonlinear optical generator according to claim 20 wherein said nonlinear material is selected from the group consisting of LiNbO 3 , LiTaO 3 , and KTiOPO 4 .
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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) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |