High-power spectral beam combining of linearly polarized Tm:fiber lasers

To date, high-power scaling of Tm:fiber lasers has been accomplished by maximizing the power from a single fiber aperture. In this work, we investigate power scaling by spectral beam combination of three linearly polarized Tm:fiber MOPA lasers using dielectric mirrors with a steep transition from hi...

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Bibliographic Details
Published inApplied optics. Optical technology and biomedical optics Vol. 54; no. 4; p. 757
Main Authors Shah, Lawrence, Sims, R Andrew, Kadwani, Pankaj, Willis, Christina C C, Bradford, Joshua B, Sincore, Alex, Richardson, Martin
Format Journal Article
LanguageEnglish
Published United States 01.02.2015
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Summary:To date, high-power scaling of Tm:fiber lasers has been accomplished by maximizing the power from a single fiber aperture. In this work, we investigate power scaling by spectral beam combination of three linearly polarized Tm:fiber MOPA lasers using dielectric mirrors with a steep transition from highly reflective to highly transmissive that enable a minimum wavelength separation of 6 nm between individual laser channels within the wavelength range from 2030 to 2050 nm. Maximum output power is 253 W with M(2)<2, ultimately limited by thermal lensing in the beam combining elements.
ISSN:2155-3165
DOI:10.1364/AO.54.000757