PHASE-LOCKED OPTICAL CHOPPERS

被引：6

作者：

JAFFE, SM ^{[1
]}

YEN, WM ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1993年 / 64卷 / 02期

关键词：

D O I：

10.1063/1.1144254

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have developed a circuit for maintaining a fixed phase relationship between two optical choppers. The basis of this circuit employs a phase-locked loop using both proportional and integral terms in the feedback control voltage. Using additional circuitry, the electronics can compensate for drifts in the phase as well as frequency of both choppers in the frequency range from 200 Hz to 3 kHz. These phased optical cboppers have been used to block background light simultaneous with a chopped cw laser in experiments that measure long lived fluorescence.

引用

页码：342 / 345

页数：4

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