自相关器
光学
光电探测器
光电导性
材料科学
光子
光子计数
光强度
光电子学
光电二极管
光刻胶
电导率
半导体
物理
激光器
量子力学
作者
Yoshihiro Takagi,Tohru Kobayashi,Keitaro Yoshihara,Shunji Imamura
出处
期刊:Optics Letters
[The Optical Society]
日期:1992-05-01
卷期号:17 (9): 658-658
被引量:138
摘要
Two-photon-induced conductivity has been observed in Si and GaAsP photodiodes and in a CdS photoconductive cell at room temperature and applied to the ultrashort optical pulse measurement with a simplified Michelson-type arrangement. The efficiency of the two-photon conductivity is found to be 3 × 10−14I A/W, where I is the intensity of the incident pulse in watts per squared centimeter. A single-shot pulse-width measurement has also been performed by using a two-dimensional silicon CCD array. Use of these inexpensive photodetectors with nonlinear characteristics has proved to be convenient for intensity correlators because of their instantaneous response to temporal coincidence of optical pulses and ease of optical arrangement.
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