15 February 2018 Cascaded Raman lasing in a PM phosphosilicate fiber with random distributed feedback
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Abstract
We report on the first demonstration of a linearly polarized cascaded Raman fiber laser based on a simple half-open cavity with a broadband composite reflector and random distributed feedback in a polarization maintaining phosphosilicate fiber operating beyond zero dispersion wavelength (~1400 nm). With increasing pump power from a Yb-doped fiber laser at 1080 nm, the random laser generates subsequently 8 W at 1262 nm and 9 W at 1515 nm with polarization extinction ratio of 27 dB. The generation linewidths amount to about 1 nm and 3 nm, respectively, being almost independent of power, in correspondence with the theory of a cascaded random lasing.
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Ivan A. Lobach, Sergey I. Kablukov, Sergey A. Babin, "Cascaded Raman lasing in a PM phosphosilicate fiber with random distributed feedback ", Proc. SPIE 10516, Nonlinear Frequency Generation and Conversion: Materials and Devices XVII, 105160C (15 February 2018); doi: 10.1117/12.2289903; https://doi.org/10.1117/12.2289903
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