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US5036220A
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Nonlinear optical radiation generator and method of controlling regions of ferroelectric polarization domains in solid state bodies
Assignee: Leland Stanford Junior University
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Filing: 1990-04-20
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Granted: 1991-07-30
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Expires: 2010-04-20
Abstract
Abstract A nonlinear waveguiding optical converter in a solid state body. The waveguide is provided with compositionally differing region (domains) of dominant electrical polarization in succeeding regions transverse to the path of guided radiation.
Inventors
- 👤 Robert L. Byer
- 👤 Martin M. Fejer
- 👤 Eric J. Lim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:27
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/3558; G02F1/37; G02F1/377; G02F1/3775; G02F1/353; G02F1/3544; G02F1/3548; G02F2202/00; G02F2202/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A nonlinear converter of electromagnetic radiation having a desired optical frequency, comprising: a body of solid state material; source means of electromagnetic radiation having one or more frequencies which are different than the desired optical frequency; waveguide means provided by said body for confining electromagnetic radiation; means for directing electromagnetic radiation from said source means into said waveguide means; and said waveguide means having a plurality of succeeding regions of differing compositions respectively providing differing states of dominant electrical polarization in succeeding regions transverse to the path of radiation guided by the same for converting radiation from said source means to output radiation having said desired optical frequency.
Claim 2
Dependent Claim
108 words
A nonlinear converter of electromagnetic radiation having a desired optical frequency, comprising: a body of solid state material; source means of electromagnetic radiation having one or more frequencies which are different than the desired optical frequency; waveguide means provided by said body for confining electromagnetic radiation; means for directing electromagnetic radiation from said source means into said waveguide means; and said waveguide means having a plurality of succeeding regions of differing compositions respectively providing differing states of dominant electrical polarization in succeeding regions transverse to the path of radiation guided by the same for converting radiation from said source means to output radiation having said desired optical frequency.
Claim 3
Dependent Claim
32 words
The nonlinear converter of claim 1 wherein said source and output electromagnetic radiation are coherent, and said regions have lengths selected to provide quasi-phasematching between said source radiation and said output radiation.
Claim 4
Dependent Claim
21 words
The nonlinear converter of claim 1 wherein said body is formed of a ferroelectric material and said waveguide is formed therein.
Claim 5
Dependent Claim
18 words
The nonlinear converter of claim 1 wherein said waveguide means is a waveguide channel defined within said body.
Claim 6
Dependent Claim
29 words
The nonlinear converter of claim 1 wherein each of said regions is generally equal in length to an odd integer multiple of the coherence length of the nonlinear interaction.
Claim 7
Dependent Claim
25 words
The nonlinear converter of claim 1 wherein said desired optical frequency is the second harmonic of the frequency of radiation provided by said source means.
Claim 8
Dependent Claim
23 words
The nonlinear converter of claim 6 wherein said radiation of said desired optical frequency has a wavelength in the range of about 390-492-nanometers.
References Cited (Backward Citations)
US3970959A
Cited
US4236785A
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US4778234A
Cited
US4739507A
Cited
US4856006A
Cited
US4865406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |