4.6 Article

High-power broadband laser source tunable from 3.0 μm to 4.4 μm based on a femtosecond Yb:fiber oscillator

Journal

OPTICS LETTERS
Volume 36, Issue 20, Pages 4020-4022

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OL.36.004020

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Funding

  1. National Institute of Standards and Technology (NIST)
  2. United States Department of Homeland Security's Science and Technology Directorate

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We describe a tunable broadband mid-IR laser source based on difference-frequency mixing of a 100 MHz femtosecond Yb:fiber laser oscillator and a Raman-shifted soliton generated with the same laser. The resulting light is tunable over 3.0 mu m to 4.4 mu m, with a FWHM bandwidth of 170 nm and maximum average output power up to 125 mW. The noise and coherence properties of this source are also investigated and described.

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