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Proceedings Paper

Broadband midinfrared from fiber laser difference frequency generation in OP-GaP
Author(s): Kevin F. Lee; Christopher J. Hensley; Peter G. Schunemann; M. E. Fermann
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Paper Abstract

We generate 52 mW of broadband pulses at 8 μm wavelength by difference frequency generation (DFG) in orientation patterned GaP (OP-GaP). Pumping by fiber lasers is possible because of the wide transparency range of GaP. An Er fiber oscillator at 1.5 μm wavelength and 90 MHz repetition rate provides pulses for direct amplification and shifting to 1.9 μm followed by amplification in Tm doped fiber. The two beams are mixed in OP-GaP with up to 20% photon conversion efficiency. The wavelength is tunable from 5 to 11 μm by changing the crystal period or the degree of wavelength shifting. With coherent broadening, we can also generate midinfrared frequency combs with tunable carrier envelope offset frequencies.

Paper Details

Date Published: 20 February 2017
PDF: 6 pages
Proc. SPIE 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, 100880V (20 February 2017); doi: 10.1117/12.2250392
Show Author Affiliations
Kevin F. Lee, IMRA America, Inc. (United States)
Christopher J. Hensley, IMRA America, Inc. (United States)
Peter G. Schunemann, BAE Systems (United States)
M. E. Fermann, IMRA America, Inc. (United States)

Published in SPIE Proceedings Vol. 10088:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVI
Konstantin L. Vodopyanov; Kenneth L. Schepler, Editor(s)

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