Effect of intensity noise on stimulated Raman scattering in high power fiber lasers and amplifiers

Balaswamy, V and Supradeepa, VR (2015) Effect of intensity noise on stimulated Raman scattering in high power fiber lasers and amplifiers. In: 2015 Workshop on Recent Advances in Photonics, WRAP 2015, 16 - 17 December 2015, Bangalore, pp. 1-4.

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Abstract

Stimulated Raman Scattering is one of the primary nonlinearities limiting power scaling of high power fiber lasers and amplifiers. Conversion of signal light into the Raman generated Stokes component can result in several undesirable consequences such as temporal instabilities, spurious pulsing, beam quality degradation, focusing errors etc. most of which are catastrophic for the laser system. In this work, we investigate a novel and important aspect of Raman scattering in fiber lasers and amplifiers. Owing to intrinsic intensity noise at high powers, we demonstrate that the actual Raman gain can be substantially higher than the expected values calculated from mean powers. Using a physical model for intensity noise, we demonstrate very interesting connections between the laser bandwidth, dispersion in fiber and the actual Raman gain. This work enables further power scaling by providing design methodologies to control Raman scattering in fiber lasers and amplifiers.

Item Type:	Conference Paper
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Dispersion; Fiber Amplifiers; Fiber Lasers; Fiber Optics; Incoherent light; Nonlinear optics; Raman scattering
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	14 Jun 2022 05:04
Last Modified:	14 Jun 2022 05:04
URI:	https://eprints.iisc.ac.in/id/eprint/73424

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