Abstract

The laser frequency stabilization is crucial to the measurement accuracy of wind speed in a Doppler wind lidar. In this thesis, a molecular iodine absorption cell was used to conduct the laser frequency stabilization. Before adding a frequency stabilization system, the seed injection Nd: YAG laser frequency was changed about 1.5GHz within 4h; after adding the frequency stabilization system, the maximum excursion of the frequency was less than 40MHz within 2.5h. Generally speaking, most of the frequency points were controlled within ±20MHz. The standard deviation was 9.54MHz. Such a way greatly improved laser frequency stability.

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