Continuous wave difference frequency generation using AgGaS2: problems encountered in power scaling

Charles E. Miller; Wode C. Eckhoff; Ulrich Simon; Frank K. Tittel; Robert F. Curl

doi:10.1117/12.177152

2 June 1994 Continuous wave difference frequency generation using AgGaS2: problems encountered in power scaling

Charles E. Miller, Wode C. Eckhoff, Ulrich Simon, Frank K. Tittel, Robert F. Curl

Proceedings Volume 2145, Nonlinear Optics for High-Speed Electronics and Optical Frequency Conversion; (1994) https://doi.org/10.1117/12.177152
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

We report the results of our efforts to increase the infrared output power from a cw difference frequency generation source based on the nonlinear material AgGaS₂ for use in infrared kinetic spectroscopy. Experimental and theoretical infrared conversion efficiencies are compared as a function of pump power, signal power, and focusing conditions. The predicted and observed IR yields agree well for the unfocused beam; however, the agreement is poor (experimental conversion a factor of 3 to 5 less than theory) for all focused conditions. The highest IR output powers obtained corresponded to experimental conditions that are slightly overfocused compared to the theoretical optimum. Thermal loading of the AgGaS₂ decreases the parametric conversion efficiency when the power in one of the input lasers beams exceeds approximately 800 mW. Infrared powers of 10 to 30 (mu) W have been achieved near 5.2 micrometers . Future improved crystals should yield powers at the AP 500-(mu) W level.

Citation Download Citation

Charles E. Miller, Wode C. Eckhoff, Ulrich Simon, Frank K. Tittel, and Robert F. Curl "Continuous wave difference frequency generation using AgGaS2: problems encountered in power scaling", Proc. SPIE 2145, Nonlinear Optics for High-Speed Electronics and Optical Frequency Conversion, (2 June 1994); https://doi.org/10.1117/12.177152

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