Frequency-sweeping single-frequency polarization-maintaining Er-doped fiber laser for FMCW lidar

Qian Zhang; Yubin Hou; Heng Jing; Xi Wang; Weihua Song; Pu Wang

doi:10.1117/12.2550143

12 March 2020 Frequency-sweeping single-frequency polarization-maintaining Er-doped fiber laser for FMCW lidar

Qian Zhang, Yubin Hou, Heng Jing, Xi Wang, Weihua Song, Pu Wang

Proceedings Volume 11437, 2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications; 114370R (2020) https://doi.org/10.1117/12.2550143
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

Abstract

Frequency-sweeping lasers have drawn considerable attentions, especially in FMCW LIDAR. The frequency sweeping single-frequency PM fiber laser is respectively realized by piezoelectric (PZT) modulation and pump modulation, which using the same Er-doped distributed Bragg reflection (DBR) fiber cavity. The central wavelength is 1552.49 nm with the extinction ratio of above 20 dB. The frequency sweeping range of PZT modulation is seen to be up to 745 MHz under the modulation repetition rate of 1Hz, and the modulation repetition rate of the pump can be tuned from 1Hz to 20 kHz. However, the frequency sweeping range and tunable range of pump modulation is 635 MHz and from 1Hz to 10 kHz, respectively. Comparing with both methods, the PZT modulation has wider sweeping range and tunable range, however, the mechanical resonance will be occurred. The pump modulation indicates virtually linearly frequency modulation. Future works to achieve more characteristic of two modulation methods are undergoing.

Citation Download Citation

Qian Zhang, Yubin Hou, Heng Jing, Xi Wang, Weihua Song, and Pu Wang "Frequency-sweeping single-frequency polarization-maintaining Er-doped fiber laser for FMCW lidar", Proc. SPIE 11437, 2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 114370R (12 March 2020); https://doi.org/10.1117/12.2550143

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