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Proceedings Paper

Threshold sensitivity in optical measurements with phase modulation
Author(s): Yakov A. Fofanov
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Paper Abstract

Photodetection shot-noise is one of the main factors limiting threshold sensitivity of optical measurements. The achievement of threshold sensitivity is especially important in optical measurements based on recording variations of light polarization due to its passage through the object under study. Such methods allow one to investigate a number of very fine details of light interaction with different media. But achievement of the shot-noise meeting limited sensitivity creates considerable difficulties because of different instrumental noises. An efficient way of decreasing the instrumental noises is the use of modulation measurement techniques. The investigation results of limiting sensitivity in optical measurements with the phase shift modulation of the orthogonal polarization component are presented in this work.

Paper Details

Date Published: 1 July 1992
PDF: 2 pages
Proc. SPIE 1811, Tenth All-Union Symposium and School on High-Resolution Molecular Spectroscopy, (1 July 1992); doi: 10.1117/12.131190
Show Author Affiliations
Yakov A. Fofanov, St. Petersburg Institute of Analytical Instruments (Russia)


Published in SPIE Proceedings Vol. 1811:
Tenth All-Union Symposium and School on High-Resolution Molecular Spectroscopy

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