Linearly polarized random fiber laser with ultimate efficiency

Linearly polarized pumping of a random fiber laser made of a 500-m PM fiber with PM fiber-loop mirror at one fiber end results in generation of linearly polarized radiation at 1.11 μm with the polarization extinction ratio as high as 25 dB at the output power of up to 9.4 W. The absolute optical eff...

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Bibliographic Details
Published in:Optics letters 2015-09, Vol.40 (17), p.4074-4077
Main Authors: Zlobina, E A, Kablukov, S I, Babin, S A
Format: Article
Language:English
Subjects:
Conversion
Efficiency
Energy conversion efficiency
Fiber lasers
Holes
Optical fibers
Optical pumping
Saturation
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Summary:Linearly polarized pumping of a random fiber laser made of a 500-m PM fiber with PM fiber-loop mirror at one fiber end results in generation of linearly polarized radiation at 1.11 μm with the polarization extinction ratio as high as 25 dB at the output power of up to 9.4 W. The absolute optical efficiency of pump-to-Stokes wave conversion reaches 87%, which is close to the quantum limit and sets a record for Raman fiber lasers with random distributed feedback and with a linear cavity as well. Herewith, the output linewidth at high powers tends to saturation at a level of 1.8 nm.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.40.004074