Tapered-fiber-enabled high-power, high-spectral-purity random fiber lasing

Optics Letters
Hanwei ZhangXiaojun Xu

Abstract

Random distributed feedback Raman fiber laser is a new kind of light source that can be applied to generate a high-power laser. In this Letter, we report on a high-power, high-spectral-purity random Raman fiber laser based on tapered fiber, in which the four-wave mixing (FWM) effect has been sufficiently suppressed. By choosing an appropriate tapered fiber length, we achieve a maximum random laser output of 491 W, and the spectral purity can reach to as high as 94%. We carefully compare the influence of different tapered fiber lengths and splicing patterns on the FWM effect by the cutting-back method and lateral-offset splicing. The results show that the transverse modes dispersion is responsible for the appearance of FWM by compensating the phase mismatch. It is believed that a kilowatt-level random laser can be obtained by further optimizing the parameters of tapered fiber.

References

Jun 11, 2008·Optics Express·V FilippovO G Okhotnikov
Nov 29, 2012·Optics Express·Juho KerttulaOleg G Okhotnikov
Dec 25, 2012·Optics Express·Ilya D VatnikSergey A Babin
Aug 31, 2013·Optics Letters·S A BabinS I Kablukov
Oct 10, 2013·Optics Express·Sergey V Smirnov, Dmitry V Churkin
Sep 15, 2015·Optics Letters·E A ZlobinaS A Babin
Mar 5, 2016·Scientific Reports·Sergey A BabinEvgeniy V Podivilov
May 4, 2016·Optics Express·Hanwei ZhangXiaojun Xu
Sep 29, 2017·Optics Letters·Hanwei ZhangXiaojun Xu
Mar 14, 2018·Optics Express·Jinyan DongYan Feng

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