K
Koichi Sayano
Researcher at California Institute of Technology
Publications - 17
Citations - 396
Koichi Sayano is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Photorefractive effect & Strontium barium niobate. The author has an hindex of 10, co-authored 17 publications receiving 396 citations.
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Patent
Wavelength stabilized laser sources using feedback from volume holograms
TL;DR: In this paper, a volume hologram reflection grating is used to generate optical feedback into the laser gain, which can be non-optical or optical feedback can also be optical.
Journal ArticleDOI
Compact read-only memory with lensless phase-conjugate holograms
Feng Zhao,Koichi Sayano +1 more
TL;DR: It is shown that large space -bandwidth product holographic images (N x N x 10(6)) with pixel sizes of a few micrometers are feasible with a reasonable-sized recording material.
Journal ArticleDOI
Self-Enhancement of Dynamic Gratings in Photogalvanic Crystals
Patent
Fabrication and applications of long-lifetime, holographic gratings in photorefractive materials
George Rakuljic,Victor Leyva,Amnon Yariv,Koichi Sayano,Arthur Bruce O'Connor,Charles E. Tyler,Xiaoping Mao,Harold E. Miller +7 more
TL;DR: In this article, 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 photore-fractive material, as by using an infrared operating wavelength.
Journal ArticleDOI
Photorefractive gain and response time of Cr‐doped strontium barium niobate
TL;DR: In this paper, the photorefractive two-beam coupling constant and response time of two Cr-doped strontium barium niobate crystals with different dopant concentrations were investigated.