A Doppler lidar with atomic Faraday devices frequency stabilization and discrimination

Abstract

Abstract:

A Doppler lidar was reported in which the laser frequency is stabilized and the backscattered light frequency is discriminated by a multi-peak and a less-peak atomic Faraday anomalous dispersion optical filter (FADOF),respectively. The transmission spectrum of the FADOF is stable as it is based on an atomic transition, and slightly tunable with a magnet due to Zeeman effect. The high frequency stability of the FADOF provides a high velocity accuracy; and the tunability of the FADOF transmission spectrum makes the measurement range flexible. We described an experimental lidar system based on cesium FADOFs, and the experimental error is of 0.74 m/s over velocities ranging from -40 to +40 m/s.

Key words: laser techniques, Doppler lidar, Doppler velocity measurement, atomic optical ?lter, atomic frequency stabilization

Li Faquan，Li Xin，Cheng Xuewu，Yang Yong，Wu Kuijun，Gong Shunsheng. A Doppler lidar with atomic Faraday devices frequency stabilization and discrimination[J]. J4, 2013, 30(1): 42-45.

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