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Spectral broadening in continuous-wave intracavity Raman lasers

Bonner, Gerald Michael and Lin, Jipeng and Kemp, Alan and Wang, Jiyang and Zhang, Huaijin and Spence, David. J. and Pask, Helen M (2014) Spectral broadening in continuous-wave intracavity Raman lasers. Optics Express, 22 (7). pp. 7492-7502. ISSN 1094-4087

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Spectral broadening of the fundamental field in intracavity Raman lasers is investigated. The mechanism for the spectral broadening is discussed and the effect is compared in two lasers using Raman crystals with different Raman linewidths. The impact of the spectral broadening on the effective Raman gain is analyzed, and the use of etalons to limit the fundamental spectral width is explored. It was found that an improvement in output power could be obtained by using etalons to limit the fundamental spectrum to a single narrow peak.