The single way detection system of lightwave polarization with high SNR

Naijian Guo

doi:10.1117/12.2294724

1 July 1990 The single way detection system of lightwave polarization with high SNR

Naijian Guo

Proceedings Volume 1230, International Conference on Optoelectronic Science and Engineering '90; 12302F (1990) https://doi.org/10.1117/12.2294724
Event: The Marketplace for Industrial Lasers 1990, 1990, Chicago, IL, United States

Abstract

Fig. 1 shows a schematic configuration of the typical single way detection system of lightwave polarization. The detection system is composed of a current sensor including a polarizer, a Faraday rotator and an analyzer, and a photoelectric detector including a photodiode, a preamplifier, AC & DC amplifiers and a divider. The light beam of the laser is linearly polarized through the polarizer. The polarizer direction of light is rotated in the Faraday rotator. By using the optical analyzer, the polarization modulation due to the Faraday effect is converted into intensity modulation. When the angle between the optical axis of the analyzer and that of the polarizer is 45 ,the maximum sensitivity and linearity of measurement are obtained. The light intensity P at the detector is expressed by P =Po( l+sin2cp ) ( 1)

Citation Download Citation

Naijian Guo "The single way detection system of lightwave polarization with high SNR", Proc. SPIE 1230, International Conference on Optoelectronic Science and Engineering '90, 12302F (1 July 1990); https://doi.org/10.1117/12.2294724

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