Long-term laser frequency stabilization for application in sodium resonance fluorescence Doppler lidar

Zhaoai Yan; Xiong Hu; Shangyong Guo; Yongqiang Cheng

doi:10.1117/12.836539

28 August 2009 Long-term laser frequency stabilization for application in sodium resonance fluorescence Doppler lidar

Zhaoai Yan, Xiong Hu, Shangyong Guo, Yongqiang Cheng

Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 738232 (2009) https://doi.org/10.1117/12.836539
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

This paper mainly reports long term laser frequency stabilization combined Pound-Drever-Hall technique with Dopplerfree saturated spectroscopy technique for application in sodium resonance fluorescence Doppler lidar. A single-mode dye laser with Pound-Drever-Hall frequency stabilization is employed in this lidar system. But the center frequency of the laser can drift due to temperature changes or piezo actuator relaxation. To reduce these drifts, a sodium Doppler-free saturated fluorescence spectroscopy system is set up and the sodium Doppler-free features are used as absolute frequency references to lock the laser frequency. A sodium vapor cell is heated to and stabilized at 65ºC in order to provide sufficient atomic sodium vapor density. A photodiode is placed adjacent to the sodium vapor cell to detect the laserinduced fluorescence. The frequency stabilization operation is based on LabVIEW program.In reaction to the error signal, this software program will act via the dye laser controller on the reference cell piezo actuator to keep the master resonator on the sodium fluorescence spectrum line. In this lidar system, we lock the laser frequency at sodium D2a line with ~4MHz precision for hours.

Citation Download Citation

Zhaoai Yan, Xiong Hu, Shangyong Guo, and Yongqiang Cheng "Long-term laser frequency stabilization for application in sodium resonance fluorescence Doppler lidar", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 738232 (28 August 2009); https://doi.org/10.1117/12.836539

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