Electro-Optic Raman-Nath Modulator Using Cascaded Periodically Poled Gratings

Electro-Optic Raman-Nath Modulator Using Cascaded Periodically Poled Gratings

We propose a new type of electro-optic modulator consisting of cascaded periodically poled Raman-Nath gratings as a building block of a 1-D spatial light modulator with a wide acceptance angle. The modulator has two grating stages of harmonic periods for an enhancement of extinction ratio. The devic...

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Veröffentlicht in:IEEE photonics technology letters 2014-12, Vol.26 (23), p.2334-2336
Hauptverfasser: Okazaki, Masahide, Suhara, Toshiaki
Format: Artikel
Sprache:eng
Schlagworte:
Beams (radiation)
Crystals
Diffraction
Electric potential
Electro-optics
Extinction
Extinction ratio
Gratings
Laser beams
Measurement by laser beam
Modulation
Modulators
Simulation
Spatial light modulators
Voltage
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Zusammenfassung:We propose a new type of electro-optic modulator consisting of cascaded periodically poled Raman-Nath gratings as a building block of a 1-D spatial light modulator with a wide acceptance angle. The modulator has two grating stages of harmonic periods for an enhancement of extinction ratio. The device was designed through the beam propagation method simulation, and fabricated in MgO:LiNbO 3 . An extinction ratio >50 was accomplished at ~150 V driving voltage.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2014.2355913