Embedded laser frequency locking for HSRL applications with an iodine absorption cell

Feitong Chen; Hongyi Wu; Tao Zhang; Nanchao Wang; Tianhu Zhang; Chuang Ye; Dong Liu

doi:10.1117/12.2624645

27 March 2022 Embedded laser frequency locking for HSRL applications with an iodine absorption cell

Feitong Chen, Hongyi Wu, Tao Zhang, Nanchao Wang, Tianhu Zhang, Chuang Ye, Dong Liu

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121695X (2022) https://doi.org/10.1117/12.2624645
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

High-spectral-resolution lidar (HSRL) has the advantages of high spatial and temporal resolution, high detection accuracy as well as strong signal-to-noise ratio. However, the stability of emitted laser frequency is crucial for the accuracy of HSRL inversion data. To ensure the data quality of HSRL, we have constructed a compact, low-cost but satisfactory frequency locking system based on an iodine absorption cell and STM32 Microprogrammed Control Unit (MCU). MCU acquires the spectrum transmittance of the iodine cell, and employs the proportional integral differential (PID) algorithm to control the drive current of seed laser; thereby the frequency of the emitted laser is locked to one of the iodine absorption line. According to the experimental results, a considerable frequency standard deviation of 4 MHz is achieved. Furthermore, the performance of this system during HSRL long-term observations is also proved to be stable and reliable

Citation Download Citation

Feitong Chen, Hongyi Wu, Tao Zhang, Nanchao Wang, Tianhu Zhang, Chuang Ye, and Dong Liu "Embedded laser frequency locking for HSRL applications with an iodine absorption cell", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121695X (27 March 2022); https://doi.org/10.1117/12.2624645

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