Measurement of weak transmittances by stochastic resonance
Optics Letters, Vol. 23, Issue 18, pp. 1480-1482 (1998)
http://dx.doi.org/10.1364/OL.23.001480
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Abstract
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 0.25B.
© 1998 Optical Society of America
[of America ]
OCIS Codes
(120.1880) Instrumentation, measurement, and metrology : Detection
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.7000) Instrumentation, measurement, and metrology : Transmission
Citation
A. Palonpon, J. Amistoso, J. Holdsworth, W. Garcia, and C. Saloma, "Measurement of weak transmittances by stochastic resonance," Opt. Lett. 23, 1480-1482 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-18-1480
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