500 nm Continuous Wave Tunable Single-Frequency
Mid-IR Light Source for CH Spectroscopy¹

L. Høgstedt, O. B. Jensen, J. S. Dam, C. Pedersen, and P. Tidemand-Lichtenberg*

DTU Fotonik, Technical University of Denmark, DK-4000 Roskilde, Denmark

*e-mail: ptli@fotonik.dtu.dk

Received June 2, 2012; in final form, June 18, 2012; published online October 1, 2012

Abstract—A computer controlled tunable mid-IR light source, based on single resonant difference frequency
generation (DFG), is experimentally investigated. The DFG process is pumped by an external cavity tapered
diode laser, tunable over a spectral range of 30 nm. Grating feedback to the single mode channel of the tapered
diode narrows the spectrum and allows for tuning of the emitted spectrum in the range from 780to 810 nm. The
DFG process takes place intra-cavity in a high finesse diode pumped 1064 nm solid state Nd:YVO₄ laser cavity,
using periodically poled LiNbO₃ as the nonlinear material. Based on this new approach, a tunable single-fre-
quency output power exceeding 3 mW was obtained in the mid-IR tuning range from 2.9 to 3.4 m.

DOI: 10.1134/S1054660X12110047

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.