Low-noise tunable high-repetition-frequency fiber laser based on an active–passive hybrid mode-locking mechanism

A hybrid mode-locked fiber laser that effectively combines the nonlinear polarization rotation (NPR) effect and active mode locking is designed and constructed. In the experiments, mode-locked pulse trains of first to 64th order with selectable harmonic mode locking, corresponding to repetition rate...

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Veröffentlicht in:Applied optics (2004) 2024-12, Vol.63 (36), p.9283
Hauptverfasser: Pan, Renshun, Fu, Yanwei, Xiao, Peiyuan, Zhang, Chenghao, Hao, Shikun, Liu, Zhi, Ma, Wanzhuo
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Sprache:eng
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Zusammenfassung:A hybrid mode-locked fiber laser that effectively combines the nonlinear polarization rotation (NPR) effect and active mode locking is designed and constructed. In the experiments, mode-locked pulse trains of first to 64th order with selectable harmonic mode locking, corresponding to repetition rates from 16.09 MHz to 1.029 GHz, were realized, and a signal-to-noise ratio of up to 69.45 dB at 1.029 GHz proved the excellent stability of the laser output. The birefringence filter, consisting of a bias-preserving pigtail at the input of the modulator and a polarization controller, allows the laser to achieve a multi-wavelength output of up to eight channels. The inclusion of an NPR structure in the cavity effectively improves the SNR of the actively mode-locked harmonic pulses compared to a single-mechanism mode-locked laser. The laser provides a stable light source for the development of practical optical frequency combs.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.543937