Abstract
A new spatial light modulator that uses electroabsorption induced by the Franz–Keldysh effect in a GaAs single crystal is proposed. The device has the same structure as the Pockels readout optical modulator, is driven by a high ac voltage, and is operated in the superprime mode. Its high-frame-rate (over 500-Hz) operation, high contrast ratio (350:1), and large γ characteristics (2.47) were experimentally confirmed in the transmission mode, although its operating-wavelength (readout) region is restricted to a narrow band near the band gap. In the reflection mode, however, this device has a high contrast ratio and large γ characteristic (approximately 5), offering the possibility of its use as a nonlinear device.
© 1998 Optical Society of America
Full Article | PDF ArticleMore Like This
Youichi Bitou and Takumi Minemoto
Appl. Opt. 37(20) 4347-4356 (1998)
Youichi Bitou and Takumi Minemoto
Appl. Opt. 37(35) 8227-8232 (1998)
Kuniharu Takizawa
Appl. Opt. 42(6) 1052-1067 (2003)