title: Dual-wavelength passively q-switched single-frequency fiber laser.
abstract: We propose a compact dual-wavelength Q-switched single-frequency fiber laser based on a 17-mm-long home-made highly Er3+/Yb3+co-doped phosphate fiber (EYDPF) and a semiconductor saturable absorber mirror (SESAM). The short cavity length and a polarization-maintaining fiber Bragg grating (PM-FBG) ensure that only one longitudinal mode is supported by each reflection peak. The maximum pulse energy of more than 34.5 nJ was realized with the shortest pulse duration of 110.5 ns and the Q-switched fiber laser has a repetition rate reaching over 700 kHz with a temporal synchronization of pulses at two wavelengths. Besides, the optical signal-to-noise ratio (OSNR) of larger than 64.5 dB was achieved.
authors.forename: Yuanfei
authors.initials: Y
authors.lastname: Zhang
authors.forename: Changsheng
authors.initials: C
authors.lastname: Yang
authors.forename: Zhouming
authors.initials: Z
authors.lastname: Feng
authors.forename: Huaqiu
authors.initials: H
authors.lastname: Deng
authors.forename: Mingying
authors.initials: M
authors.lastname: Peng
authors.forename: Zhongmin
authors.initials: Z
authors.lastname: Yang
authors.forename: Shanhui
authors.initials: S
authors.lastname: Xu