High-efficiency generation in a short random fiber laser


We demonstrate a high-efficiency random lasing in a 850 m span of a phosphosilicate fiber. Random distributed feedback owing to the Rayleigh backscattering in the fiber enables narrowband generation with output power of up to 7.3 W at the Stokes wavelength λS = 1308 nm from 11 Wof the pump power at λP = 1115 nm. The laser demonstrates unique generation efficiency. Near the generation threshold, more than 2 W of output power is generated from only 0.5 W of pump power excess over the generation threshold. At high pump power, the quantum conversion efficiency defined as a ratio of generated and pump photons at the laser output exceeds 100%. Itis explained by the fact that every pump photon is converted into the Stokes photon far from the output fiber end, while the Stokes photons have lower attenuation than the pump photons.

Publication DOI: https://doi.org/10.1088/1612-2011/11/7/075101
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Uncontrolled Keywords: raman laser,random distributed feedback laser,random laser,Physics and Astronomy (miscellaneous),Instrumentation
Publication ISSN: 1612-202X
Last Modified: 27 Jun 2024 08:27
Date Deposited: 04 Mar 2015 11:55
Full Text Link: http://iopscien ... 2X/11/7/075101/
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2014-07
Authors: Vatnik, I.D.
Churkin, D.V.
Podivilov, Evgeni V.
Babin, Sergey A.



Version: Accepted Version

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