Two-dimensional fiber laser Doppler velocimeter by integrated optical frequency shifter

Kazuo Hasegawa; Satoru Kato; Hiroshi Itoh

doi:10.1117/12.347821

7 May 1999 Two-dimensional fiber laser Doppler velocimeter by integrated optical frequency shifter

Kazuo Hasegawa, Satoru Kato, Hiroshi Itoh

Proceedings Volume 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99); (1999) https://doi.org/10.1117/12.347821
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '99), 1999, Yokohama, Japan

Abstract

We developed a novel fiber laser Doppler velocimeter (FLDV) using an integrated optical frequency shifter on LiNbO₃ substrate. The FLDV system consists of a small probe-head (diameter of 17 mm and length of 60 mm) with two polarization maintaining fibers for projection and one single mode fiber for detection. The FLDV system can measure the line velocity of two-dimensional vectorial flow by only one probe tilted against the direction of the flow. We will describe the construction of the measurement system and the measurements of actual velocities. Two vectorial components of the line velocity were obtained from the calculations between the interference signals detected on a photo-detector.

Citation Download Citation

Kazuo Hasegawa, Satoru Kato, and Hiroshi Itoh "Two-dimensional fiber laser Doppler velocimeter by integrated optical frequency shifter", Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); https://doi.org/10.1117/12.347821

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