High-Performance 1024-Pixel EO Spatial Light Modulator Using Cascaded Periodically-Poled Raman-Nath Gratings

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 appli...

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Veröffentlicht in:	Journal of lightwave technology 2015-12, Vol.33 (24), p.5195-5200
Hauptverfasser:	Okazaki, Masahide, Suhara, Toshiaki
Format:	Artikel
Sprache:	eng
Schlagworte:	Acceptability Crystals electro-optic modulator Electro-optics Electrodes Electrooptic modulators Extinction Extinction ratio Gratings Laser beams lithium niobate Modulators multi-emitter semiconductor laser periodically-poled structure Pixels Raman-Nath diffraction Semiconductor lasers spatial light modulator Spatial light modulators Wavelengths
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Beschreibung
Zusammenfassung:	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.
ISSN:	0733-8724 1558-2213
DOI:	10.1109/JLT.2015.2496999