POSITION DEPENDENCE OF THE TRANSIENT-RESPONSE OF A POSITION-SENSITIVE DETECTOR UNDER PERIODIC PULSED-LIGHT MODULATION

被引：28

作者：

NARAYANAN, C ^{[1
]}

BUCKMAN, AB ^{[1
]}

BUSCHVISHNIAC, I ^{[1
]}

WANG, WJ ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT MECH ENGN,AUSTIN,TX 78712

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 1993年 / 40卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1109/16.231576

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A model based on sinusoidal steady-state analysis is developed for the position-sensitive detector (PSD), which is approximated as a distributed RC transmission line. This model is used to study the output response of the lateral effect PSD, in two cases: i) when only one pulse-modulated light beam is incident and ii) when two light beams of different wavelengths, with one beam modulated at a frequency f and the other beam modulated at a frequency 2f, are incident at the same time. Our simulation shows, and experiments confirm, that the transient response of the PSD consists of a position-dependent dead time (time for the output current to sense the change in the induced photocurrent) and a position-independent exponential rise/decay time. For the application of resolving the positions of two or more pulse-modulated light spots, it is shown that there is a position-dependent upper limit on the usable modulation frequency. With the per-unit-length values chosen for the sheet resistance as R = 315 OMEGA/mm, and the junction capacitance as C = 330 pF/mm, the modulation frequency limit is determined to be 20 kHz.

引用

页码：1688 / 1694

页数：7

共 4 条

[1] LATERAL PHOTODETECTOR OPERATING IN FULLY REVERSE-BIASED MODE [J].