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Octave-spanning, continuous-wave supercontinuum generation with record power using standard telecom fibers pumped with power-combined fiber lasers

Arun, S and Choudhury, V and Balaswamy, V and Supradeepa, VR (2020) Octave-spanning, continuous-wave supercontinuum generation with record power using standard telecom fibers pumped with power-combined fiber lasers. In: Optics Letters, 45 (5). pp. 1172-1175.

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Official URL: https://doi.org/10.1364/OL.384690

Abstract

We have demonstrated a record output power of �72 W, octave-spanning, nearly single-mode, continuous-wave supercontinuum with a bandwidth of �1050 nm using standard telecom fiber as the nonlinear medium in an allfiber architecture. We have utilized the recently proposed nonlinear power combining architecture by which power scaling is achieved using multiple independent Ytterbium lasers operating at different wavelengths. In this Letter, Raman conversions in the fiber assist in combining multiple input laser lines into a single wavelength which then undergoes supercontinuum generation. The architecture is based on the recently proposed grating-free, cascaded Raman lasers based on distributed feedback.Here allRaman conversions are well seeded, thereby enhancing the efficiency of supercontinuum generation to �44. In this Letter, we have obtained power spectral densities (PSDs) of >3mW=nm from 850 to 1350 nm and a high PSD of >100mW=nm from 1350 to 1900 nm. Here we have also investigated the power-combined supercontinuum generation for different pump wavelength combinations demonstrating the flexibility of this technique. © 2020 Optical Society of America.

Item Type: Journal Article
Publication: Optics Letters
Publisher: OSA - The Optical Society
Additional Information: Copyright of this article belongs to OSA - The Optical Society
Keywords: Architecture; Continuous wave lasers; Fiber lasers; Fibers; Pumping (laser); Spectral density, Combined fiber laser; Continuous Wave; Multiple inputs; Nonlinear medium; Power combining; Raman conversion; Single wavelength; Ytterbium lasers, Supercontinuum generation
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 09 Apr 2021 10:54
Last Modified: 09 Apr 2021 10:54
URI: http://eprints.iisc.ac.in/id/eprint/64817

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