Mid-infrared Optical Frequency Combs Based On Difference Frequency Generation For Dual-comb Spectroscopy

Dual optical frequency combs at 2.8-3.4 μm with powers >210 mW were produced with femtosecond fiber-lasers and difference frequency generation. Interferograms between the combs have been demonstrated as a step towards mid-infrared dual-comb spectroscopy. © 2015 OSA.2015-AugustSchliesser, A., Picque, N., Hansch, T.W., Mid-infrared frequency combs (2012) Nature Phot, 6, pp. 440-449Coddington, I., Swann, W.C., Newbury, N.R., Coherent multiheterodyne spectroscopy using stabilized optical frequency combs (2008) Phys. Rev. Lett, 100 (1), p. 013902Diddams, S.A., Hollberg, L., Mbele, V., Molecular fingerprinting with the resolved modes of a femtosecond laser frequency comb (2007) Nature, 445, pp. 627-630Sinclair, L.C., Coddington, I., Swann, W.C., Rieker, G.B., Haiti, A., Iwakuni, K., Newbury, N.R., Operation of an optically coherent frequency comb outside the metrology lab (2014) Opt. Exp, 22, pp. 6996-7006Erny, C., Moutzouris, K., Biegert, J., Kuhlke, D., Adler, F., Leitenstorfer, A., Keller, U., Mid-infrared difference-frequency generation of ultrashort pulses tunable between 3.2 and 4.8 μm from a compact fiber source (2007) Opt. Lett, 32 (9), pp. 1138-1140Meek, S.A., Poisson, A., Guelachvili, G., Hansch, T.W., Picque, N., Fourier transform spectroscopy around 3 μm with a broad difference frequency comb (2014) Appl. Phys. B, 114, pp. 573-578Zhu, F., Hundertmark, H., Kolomenskii, A.A., Strohaber, J., Holzwarth, R., Schuessler, H.A., High-power midinfrared frequency comb source based on a femtosecond Er:fiber oscillator (2013) Opt. Lett, 38, pp. 2360-2362Conference on Lasers and Electro-Optics, CLEO 201510 May 2015 through 15 May 201