High-speed and high-contrast spatial light modulator that uses electroabsorption in a GaAs single crystal

被引：15

作者：

Bitou, Y

Ohta, H

Minemoto, T

机构：

[1] Kobe Univ, Grad Sch Sci & Technol, Nada Ku, Kobe, Hyogo 657, Japan

[2] Kobe Univ, Fac Engn, Nada Ku, Kobe, Hyogo 657, Japan

来源：

APPLIED OPTICS | 1998年 / 37卷 / 08期

关键词：

D O I：

10.1364/AO.37.001377

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 gamma 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 gamma characteristic (approximately 5), offering the possibility of its use as a nonlinear device. (C) 1998 Optical Society of America.

引用

页码：1377 / 1385

页数：9

共 14 条

[1]

BITOU Y, 1997, SPATIAL LIGHT MODULA, V14, P147

[2] AMPLITUDE AND PHASE MODULATION IN A 4-MU-M-THICK GAAS/ALGAAS MULTIPLE QUANTUM WELL MODULATOR [J].