CaltechAUTHORS
Published March 26, 2012 | Version Published
Journal Article Open

Octave-spanning ultrafast OPO with 2.6-6.1µm instantaneous bandwidth pumped by femtosecond Tm-fiber laser

Creators

  • 1. ROR icon Stanford University
  • 2. ROR icon Aisin (United States)
  • 3. ROR icon BAE Systems (United States)

Abstract

We report the extension of broadband degenerate OPO operation further into mid-infrared. A femtosecond thulium fiber laser with output centered at 2050 nm synchronously pumps a 500-μm-long crystal of orientation patterned GaAs providing broadband gain centered at 4.1 µm. We observe a pump threshold of 17 mW and output bandwidth extending from 2.6 to 6.1 µm at the −30 dB level. Average output power was 37 mW. Appropriate resonator group dispersion is a key factor for achieving degenerate operation with instantaneously broad bandwidth. The output spectrum is very sensitive to absorption and dispersion introduced by molecular species inside the OPO cavity.

Additional Information

© 2012 Optical Society of America. Received 20 Dec 2011; revised 10 Feb 2012; accepted 13 Feb 2012; published 13 Mar 2012. The authors thank Tim Brand for fabricating GaAs crystals designed for operation at Brewster angle. We gratefully acknowledge support from IMRA, the US Office of Naval Research, NASA, Air Force Office of Scientific Research, Agilent Technologies, Stanford Medical School, Stanford Woods Institute, and Sanofi Aventis.

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Published - oe-20-7-7046.pdf

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Additional details

Identifiers

Eprint ID
86940
Resolver ID
CaltechAUTHORS:20180608-144456654

Funding

IMRA
Office of Naval Research (ONR)
NASA
Air Force Office of Scientific Research (AFOSR)
Agilent Technologies
Stanford Medical School
Stanford Woods Institute for the Environment
Sanofi-Aventis

Dates

Created
2018-06-11
Created from EPrint's datestamp field
Updated
2021-11-15
Created from EPrint's last_modified field