Threshold sensitivity in optical measurements with phase modulation

Yakov A. Fofanov

doi:10.1117/12.131190

1 July 1992 Threshold sensitivity in optical measurements with phase modulation

Yakov A. Fofanov

Proceedings Volume 1811, Tenth All-Union Symposium and School on High-Resolution Molecular Spectroscopy; (1992) https://doi.org/10.1117/12.131190
Event: Tenth All-Union Symposium and School on High Resolution Molecular Spectroscopy, 1991, Omsk, Russian Federation

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.

Citation Download Citation

Yakov A. Fofanov "Threshold sensitivity in optical measurements with phase modulation", Proc. SPIE 1811, Tenth All-Union Symposium and School on High-Resolution Molecular Spectroscopy, (1 July 1992); https://doi.org/10.1117/12.131190

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