An all-polarization-maintaining repetition-tunable erbium-doped passively mode-locked fiber laser
Zhao Guang-Zhen (赵光贞)a, Xiao Xiao-Sheng (肖晓晟)a, Meng Fei (孟飞)b, Mei Jia-Wei (梅佳伟)a, Yang Chang-Xi (杨昌喜)a
a State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084, China; b Division of Time and Frequency Metrology, National Institute of Metrology, Beijing 100013, China
Abstract An environmentally stable, repetition rate tunable, all-polarization-maintaining, Er-doped pulse fiber laser with a single-wall carbon nanotubes saturated absorber is demonstrated. The ring laser cavity includes a delay line enabling a tunable repetition rate to vary from 35.52 MHz to 35.64 MHz with continuous mode-locked operation. The laser output parameters confirm that the tunable mode-locked operations are stable. High environmental stability is also confirmed by the-130 dBc/Hz low phase noise, a 70-dB signal-to-noise ratio of radio frequency signals, a low amplitude fluctuation of 5.76×10-4, and a low fluctuation of repetition rate of 12 Hz. The laser shows a high degree of polarization of 93%.
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