Optical Instruments, Volume. 46, Issue 1, 1(2024)

Study on asynchronous locking technology of femtosecond fiber laser with full deflection maintaining

Cheng TANG, Qiang HAO*, and Zheng LIU
Author Affiliations
  • School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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    In this paper, a terahertz dual-comb ranging system is constructed based on a fully bias-maintaining erbium-doped fiber laser, phase-locked loop system and terahertz ranging optical path. In the experiment, the full bias-maintaining erbium-doped fiber laser had a repetition frequency of 79.261 MHz, and the repetition frequency was locked and the frequency was adjustable at 1.54 MHz by piezoelectric ceramic (PZT) and stepper motor (SM) dual-stage feedback control scheme. The peak-peak jitter and standard deviation of jitter were ±1.5 mHz and 0.4 mHz respectively. The repetition frequency difference of the dual-comb was set at 10 Hz, and the maximum jitter and standard deviation of repetition frequency difference within 10 min were calculated to be 3 mHz and 0.6 mHz. Furthermore, the asynchronous sampling dual-comb system was applied to the terahertz ranging, and the error of measuring the moving distance was 3 μm. The system has the advantages of high locking precision and strong stability, and is expected to be used in biological nondestructive testing and industrial precision machining.

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    Cheng TANG, Qiang HAO, Zheng LIU. Study on asynchronous locking technology of femtosecond fiber laser with full deflection maintaining[J]. Optical Instruments, 2024, 46(1): 1

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    Paper Information

    Category:

    Received: Mar. 3, 2023

    Accepted: --

    Published Online: Mar. 6, 2024

    The Author Email: HAO Qiang (qianghao@usst.edu.cn)

    DOI:10.3969/j.issn.1005-5630.202303030034

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