Infrared and Laser Engineering, Volume. 50, Issue 3, 20200205(2021)
Stable mode-locked Yb-fiber laser with a 6 MHz repetition rate tuning range
Fig. 1. Schematic of mode-locked Yb-fiber laser and the details of spatial optical path. PZT, piezoelectric ceramic transducer; PBS, polarization beam splitter; SESAM, semiconductor saturable absorption mirror; PM-CFBG, polarization-maintained chirped fiber Bragg grating; PM SMF, polarization-maintained single mode fiber; WDM, wavelength division multiplexer
Fig. 2. Dechirped pulse duration and Gaussian fitting
Fig. 3. The output spectra and SSE values under different NCD when tuning the optical delay line. Each graph consists of 6 spectra with different repetition rate. The NCD of each graph is (a) 0 ps2, (b) −1.13×10−2 ps2, (c) −2.26×10−2 ps2, (d) −3.39×10−2 ps2, (e) −4.52×10−2 ps2, (f) −5.65×10−2 ps2, respectively
Fig. 4. (a) 3-D model of the compact mechanical structure, the overall dimension is 320 mm×220 mm×65 mm. (b) Appearance of the compact laser. (c) Schematic of the repetition rate locking system
Fig. 5. (a) Autocorrelation trace of the output of the compact system @36 mW pump power. (b) Output spectrum of the compact system @36 mW pump. (c) Radiofrequency spectrum of the compact system with resolution bandwidth of 30 Hz
Fig. 6. (a) Repetition rate of the fundamental harmonic of the output signal under free-running state. (b) Allan deviation of the repetition rate under free-running state. (c) Repetition rate of the fundamental harmonic of the output signal with feedback loop activated. (d) Allan deviation of the repetition rate with feedback loop activated
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Sicong Zhao, Peng Qin, Dongyu Yan, Bowen Liu, Hongrui Wang, Youjian Song, Sijia Wang, Minglie Hu. Stable mode-locked Yb-fiber laser with a 6 MHz repetition rate tuning range[J]. Infrared and Laser Engineering, 2021, 50(3): 20200205
Category: Lasers & Laser optics
Received: Jun. 3, 2020
Accepted: --
Published Online: Jul. 15, 2021
The Author Email: Wang Sijia (sj0607@163.com)