4 March 2016 Efficient cascaded generation of narrowband linearly-polarized radiation in random Raman fiber laser
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Abstract
We demonstrate a linearly-polarized high efficiency random Raman lasing of the 1st-order Stokes wave and cascaded generation in 0.5- and 1-km-long PM fiber, respectively, under polarized pumping. Quantum efficiency of converting input pump radiation (1.05μm) into the 1st (1.11μm), 2nd (1.17μm) and 3rd-order (1.23μm) Stokes waves is about 80% in the cascaded generation, regardless of the order, and amounts to 92% for the 1st-order Stokes wave in the 0.5-km PM fiber. Polarization extinction ratio is >22 dB for all the waves at output powers of up to 10 W. An analytical model describing adequately the generated power for all components of the cascaded random Raman fiber laser has been developed. The laser bandwidth increases with Stokes order, amounting to ~1, ~2 and ~3 nm for the consecutive orders, respectively.
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Sergey A. Babin, Ekaterina A. Zlobina, Sergey I. Kablukov, Evgeniy V. Podivilov, "Efficient cascaded generation of narrowband linearly-polarized radiation in random Raman fiber laser", Proc. SPIE 9731, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XV, 97310P (4 March 2016); doi: 10.1117/12.2212973; https://doi.org/10.1117/12.2212973
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