Multichannel optical spectrum analyzer for laser Doppler signals,      using a liquid crystal spatial light modulator

Tomoaki Eiju; Thomas H. Barnes; Kiyofumi Matsuda; Shigeru Kokaji

doi:10.1117/12.60065

1 January 1993 Multichannel optical spectrum analyzer for laser Doppler signals, using a liquid crystal spatial light modulator

Tomoaki Eiju, Thomas H. Barnes, Kiyofumi Matsuda, Shigeru Kokaji

Author Affiliations +

Optical Engineering, Vol. 32, Issue 1, (January 1993). https://doi.org/10.1117/12.60065

Abstract

A novel optical signal processor has been developed for analyzing laser Doppler velocimeter output signals. Optical Fourier transform techniques are used to determine the spectrum of the laser Doppler signals, with a liquid crystal spatial light modulator used as the input device to the optical system. The optical Fourier transform is one dimensional, performed by an anamorphic lens system that performs a Fourier transform in the horizontal direction of the input plane while imaging in the vertical direction. The system is therefore capable of simultaneously analyzing multiple laser Doppler input signals. The capabilities of the system are demonstrated using both synthetic computer-generated input signals and "real" input data obtained from a laser Doppler velocimeter.

Citation Download Citation

Tomoaki Eiju, Thomas H. Barnes, Kiyofumi Matsuda, and Shigeru Kokaji "Multichannel optical spectrum analyzer for laser Doppler signals, using a liquid crystal spatial light modulator," Optical Engineering 32(1), (1 January 1993). https://doi.org/10.1117/12.60065

Published: 1 January 1993

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