US5199097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light wavelength shifter
Assignee: Pioneer Corp
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Filing: 1991-09-26
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Granted: 1993-03-30
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Expires: 2011-09-26
Abstract
Abstract An optical waveguide type light wavelength shifter device has a core made of a nonlinear optical crystal and a cladding. The optical waveguide type light wavelength shifter device is provided with a thermoelectric element so that wavelength variation of the second harmonic wave resulting from a variation in the wavelength of an incident light can be minimized.
Inventors
- 👤 Kichiro Shinokura
- 👤 Tetsuro Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:41
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37; G02F1/377; G02F1/01; G02F1/0147; G02F1/353; G02F1/3544; G02F1/3546
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
A light wavelength shifter device comprising: an optical waveguide type light wavelength shifter element which comprises a core of a nonlinear optical crystal having a varying rate of refractive index with respect to temperature higher than 1×10 -4 /° C., and a cladding in contact with the core so that a primary incident light on the core can be shifted to a second harmonic wave having a wavelength of half the wavelength of said primary incident light; and a thermoelectric element in contact with said optical waveguide type light wavelength shifter element.
Claim 2
Dependent Claim
92 words
A light wavelength shifter device comprising: an optical waveguide type light wavelength shifter element which comprises a core of a nonlinear optical crystal having a varying rate of refractive index with respect to temperature higher than 1×10 -4 /° C., and a cladding in contact with the core so that a primary incident light on the core can be shifted to a second harmonic wave having a wavelength of half the wavelength of said primary incident light; and a thermoelectric element in contact with said optical waveguide type light wavelength shifter element.
Claim 3
Dependent Claim
33 words
A light wavelength shifter device as claimed in claim 1, wherein said thermoelectric element is made of a Peltier device whose generation and absorption of heat are regulated by a supplied electric current.
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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) | 1996-03-29 | 1996-09-28 | 1997-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-29 | 2000-09-28 | 2001-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-29 | 2004-09-28 | 2005-03-30 | $7700.00 | Window Closed / Lapsed |