A new spatial light modulator that uses the electroabsorption and the electro-optic effects in a GaAs single crystal is proposed. The device has the same structure as a Pockels readout optical modulator and can be operated at a frame rate higher than 500 Hz. When the electroabsorption and the electro-optic effects are combined, the dynamic range (contrast ratio) becomes larger than that which results when either effect is used singly. It was experimentally confirmed that the modulator has a high contrast ratio (greater than 2000:1), high sensitivity, and consequently large γ characteristics.
© 1998 Optical Society of America
Original Manuscript: August 18, 1997
Revised Manuscript: February 23, 1998
Published: July 10, 1998
Youichi Bitou and Takumi Minemoto, "High-contrast spatial light modulator by use of the electroabsorption and the electro-optic effects in a GaAs single crystal," Appl. Opt. 37, 4347-4356 (1998)