12 January 2018 408-fs SESAM mode locked Cr:ZnSe laser
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We report self-starting femtosecond operation of a 127-MHz SESAM mode locked Cr:ZnSe laser around 2420 nm. A thulium doped double clad fiber laser at 1908 nm was used as the pumping source. In the normal dispersion regime, stable pulse pairs with constant phase differences in the multipulse regime were observed. The maximum output power was 342 mW with respect to incident pump power of 4.8 W and the corresponding slope efficiency was 10.4%. By inserting a piece of sapphire plate, dispersion compensation was achieved and the intra-cavity dispersion was moved to the anomalous regime. A maximum output power of 403 mW was obtained and the corresponding slope efficiency was 12.2%. Pulse width was measured to be 408 fs by a collinear autocorrelator using two-photon absorption in an InGaAs photodiode. The laser spectrum in multipulse operation showed a clear periodic modulation.
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Xiangbao Bu, Xiangbao Bu, Yuhang Shi, Yuhang Shi, Jia Xu, Jia Xu, Huijuan Li, Huijuan Li, Pu Wang, Pu Wang, "408-fs SESAM mode locked Cr:ZnSe laser", Proc. SPIE 10619, 2017 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 1061903 (12 January 2018); doi: 10.1117/12.2295536; https://doi.org/10.1117/12.2295536


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