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We report a compact 930 nm passive mode-locking Nd-doped all-fiber laser for the first time. The laser consists of a Nd-doped all-fiber oscillator and a Nd-doped all-fiber amplifier. The oscillator uses the linear cavity structure. The gain medium is an 8 cm highly Nd-doped silica fiber, and the pump source is a semiconductor laser with the central wavelength of 808 nm and the maximum output power of 200 mW. By using a semiconductor saturable absorber mirror as saturable absorber to realize passive mode-locking, the ultrashort pulse laser is achieved. The laser generates 8.8 ps pulse width with the average power of 1 mW and the repetition rate of 28.2 MHz. The spectrum has sharp edge with the 3 dB spectral width of 0.37 nm. To avoid the competition from 1060 nm wavelength, we make use of a 10 m W-typed Nd-doped fiber as the gain medium.As a result,the 1060 nm wavelength during the amplification is effectively suppressed. Finally, we achieve a laser output with the average power of 117 mW, the center wavelength of 930 nm, the repetition rate of 28.2 MHz, and the single pulse energy of 4.15 nJ. The pulse width is 8.8 ps and the 10 dB spectrum width is 2.98 nm. © 2017, Chinese Lasers Press. All right reserved.
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