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We report an environmentally stable and ultracompact dissipative soliton mode-locked fiber laser with a semiconductor-saturable absorber mirror (SESAM). A polarization-maintaining fiber loop mirror is used as the linear cavity end mirror, which also serves other purposes, such as a laser output coupler, a polarizer, and a pulse-shaping bandpass filter. Self-starting stable mode-locking operation with 2-nJ pulse energy and 24-ps pulsewidth is achieved. The laser emission shows high polarization extinction ratio of over 22 dB, with excellent stability.
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Zhang et al. (2014) studied this question.
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