Title :
High-Performance 1024-Pixel EO Spatial Light Modulator Using Cascaded Periodically-Poled Raman-Nath Gratings
Author :
Okazaki, Masahide ; Suhara, Toshiaki
Author_Institution :
SCREEN Holdings Co. Ltd., Kyoto, Japan
Abstract :
We propose and demonstrate an electro-optic Raman-Nath spatial light modulator with a wide acceptable angle using cascaded periodically-poled gratings. The modulator has three grating stages of harmonic periods for enhancement of the extinction ratio. The modulator of 1024 pixels for practical application was designed and fabricated in MgO:LiNbO3. The fine pixel profile and an extinction ratio > 20 were accomplished at 808-nm wavelength light of a 30-W multi-emitter semiconductor laser.
Keywords :
Raman spectra; diffraction gratings; electro-optical modulation; extinction coefficients; lithium compounds; magnesium compounds; niobium compounds; optical design techniques; optical fabrication; semiconductor lasers; spatial light modulators; LiNbO3:MgO; cascaded periodically-poled Raman-Nath gratings; electro-optic Raman-Nath spatial light modulator; extinction ratio; multiemitter semiconductor laser; power 30 W; wavelength 808 nm; Crystals; Electrodes; Electrooptic modulators; Extinction ratio; Gratings; Laser beams; Raman-Nath diffraction; electro-optic modulator; lithium niobate; multi-emitter semiconductor laser; periodically-poled structure; spatial light modulator;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2015.2496999
