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High PowerTm3+-Doped Fiber Lasers Tuned by a Variable Reflective Output Coupler

Yulong Tang, Yong Yang, Jianqiu Xu
2008 Research Letters in Optics  
Wide wavelength tuning by a variable reflective output coupler is demonstrated in high-power double-cladTm3+-doped silica fiber lasers diode-pumped at∼790 nm. Varying the output coupling from 96% to 5%, the laser wavelength is tuned over a range of 106 nm from 1949 to 2055 nm. The output power exceeds 20 W over 90-nm range and the maximum output power is 32 W at 1949 nm for 51-W launched pump power, corresponding to a slope efficiency of∼70%. Assisted with different fiber lengths, the tuning
more » ... gths, the tuning range is expanded to 240 nm from 1866 to 2107 nm with the output power larger than 10 W.
doi:10.1155/2008/919403 fatcat:kn6jtpmov5aorbp4vc7plqu42u