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Mid-Infrared Optical Frequency Combs based on Difference Frequency Generation for Dual-Comb Spectroscopy



Flavio Caldas da Cruz, Daniel I. Maser, Todd Johnson, Gabriel G. Ycas, Andrew M. Klose, Fabrizio R. Giorgetta, Ian R. Coddington, Nathan R. Newbury, Scott A. Diddams


Mid-infrared femtosecond optical frequency combs at 2.8 - 3.5 υm were produced by difference frequency generation of the spectral components of a near-infrared comb in a 3-mm long MgO:PPLN crystal. We observe strong pump depletion and 9.3 dB parametric gain at the 1.5 υm signal, which yields powers above 500 mW (3 υW/mode) in the 3 υm idler. Use of polarization-maintaining (PM) fiber amplifiers provided higher stability and reduced amplitude noise as compared to non-PM fiber systems. Dual-comb absorption spectroscopy demonstrated for acetylene at 3 υm shows good prospect for broadband, high-resolution MIR molecular spectroscopy.
Conference Dates
May 10, 2015-January 15, 2016
Conference Location
San Josue, CA
Conference Title
Proceedings 2014 Conference on Lasers and Electro-Optics


Fiber optics amplifiers and oscillators, Nonlinear wave mixing, Spectroscopy, Fourier transforms, Spectroscopy, heterodyne, Ultrafast lasers, Ultrafast nonlinear optics


Caldas, F. , Maser, D. , Johnson, T. , Ycas, G. , Klose, A. , Giorgetta, F. , Coddington, I. , Newbury, N. and Diddams, S. (2015), Mid-Infrared Optical Frequency Combs based on Difference Frequency Generation for Dual-Comb Spectroscopy, Proceedings 2014 Conference on Lasers and Electro-Optics, San Josue, CA (Accessed February 21, 2024)
Created May 10, 2015, Updated February 19, 2017