发明名称 |
Fabrication and applications of long-lifetime, holographic gratings in photorefractive materials |
摘要 |
Substantial improvements in photorefractive device lifetimes are provided by control of electron migration which results in the decay of gratings in photorefractive materials due to diffusion and other effects. A new class of photorefractive devices using compensating electronic and ionic gratings having relatively low efficiency but nonetheless usable gratings is provided by arranging the gratings to be reflective in a wavelength band outside the photo-excitation band of the photorefractive material, as by using an infrared operating wavelength. Longer lifetimes in high efficiency gratings are achieved by constant or periodic illumination of photorefractive materials to assure uniform charged distribution of electrons and maintenance of the ionic backbone grating.
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申请公布号 |
US5796096(A) |
申请公布日期 |
1998.08.18 |
申请号 |
US19950422509 |
申请日期 |
1995.04.13 |
申请人 |
ACCUWAVE CORPORATION |
发明人 |
RAKULJIC, GEORGE ANTHONY;LEYVA, VICTOR;YARIV, AMNON;SAYANO, KOICHI;O'CONNOR, ARTHUR BRUCE;TYLER, CHARLES E.;MAO, XIAOPING;MILLER, JR., HAROLD EVERETT |
分类号 |
G02B5/18;G02B5/20;G02B5/32;G02B6/02;G02B6/34;G03H1/02;G03H1/04;G03H1/26;G03H1/28;G06K9/76;G11B7/0065;G11C13/04;H01S3/06;H01S3/08;H01S3/109;H01S3/16;(IPC1-7):G01J3/50;G01J3/28;G02B27/00 |
主分类号 |
G02B5/18 |
代理机构 |
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代理人 |
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