Measurement of weak transmittances by stochastic resonance

被引：12
|
作者：
Palonpon, A [1 ]
Amistoso, J
Holdsworth, J
Garcia, W
Saloma, C
机构：
[1] Univ Philippines, Natl Inst Phys, Quezon 1101, Philippines
[2] Ateneo Manila Univ, Dept Phys, Quezon, Philippines
来源：
OPTICS LETTERS | 1998年 / 23卷 / 18期
关键词：
D O I：
10.1364/OL.23.001480
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We use stochastic resonance to measure weak transmittance amplitudes that are below the instrumental detection limit. Gaussian noise is added to the subthreshold (chopped) transmittance signal T(t) before detection by a crossing detector that uses a dc reference signal B > 0. Without noise, no measurement is possible because T(t) < B. A fourfold improvement has been obtained in the detection limit, permitting the measurement of amplitudes that are as small as 0.25 B. (C) 1998 Optical Society of America.
引用
收藏
页码：1480 / 1482
页数：3
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