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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 103Laser Doppler Velocimetry with Small Wavelength...

Laser Doppler Velocimetry with Small Wavelength Sensitivity Using Planar Lightwave Circuit

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Abstract:

Using a semiconductor laser as a lightsource of a laser Doppler velocimeter (LDV) is desirable to reduce the size and the cost of velocity measurement equipment. However, typical inexpensive semiconductor lasers suffer from the problem of instability in lasing wavelength. In this paper, LDVs with small wavelength sensitivity are reviewed. The wavelength sensitivity can be reduced by using arrayed waveguide gratings (AWGs), Mach-Zehnder interferometers (MZIs) or cascaded MZIs. These structures can be formed by planar lightwave circuit (PLC) technology. The principles and the possibility for realizing wavelength-insensitive operation are discussed.

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Periodical:

Applied Mechanics and Materials (Volume 103)

Pages:

76-81

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.103.76

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Online since:

September 2011

Authors:

Koichi Maru, Yusaku Fujii

Keywords:

Arrayed Waveguide Grating, Laser Doppler Velocimeter, Mach-Zehnder Interferometer, Wavelength Sensitivity

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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