Abstract
A laser Doppler velocimeter (LDV) using nonmechanical scanning of multiple points spatially encoded by multichannel serrodyne frequency shifting is proposed for cross-sectional velocity distribution measurement. In the proposed LDV, nonmechanical scanning using wavelength change and simultaneous multipoint measurement using spatial encoding are combined. The use of a phase-shifter array for multichannel serrodyne modulation makes it possible to simplify the generation of a spatially encoded beam array. An experiment was performed using a sensor probe setup with a six-channel beam array. The results indicate that two-dimensional velocity distribution measurement was successfully demonstrated.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Koichi Maru
Appl. Opt. 55(36) 10174-10179 (2016)
Koichi Maru and Takahiro Hata
Appl. Opt. 51(34) 8177-8183 (2012)
Koichi Maru and Takahiro Hata
Appl. Opt. 51(20) 4783-4787 (2012)