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Tunable midinfrared source by difference frequency generation in bulk periodically poled KTiOPO4
 

Summary: Tunable midinfrared source by difference frequency generation in bulk
periodically poled KTiOPO4
K. Fradkin,a)
A. Arie, A. Skliar, and G. Rosenman
Department of Electrical Engineering--Physical Electronics, Faculty of Engineering, Tel Aviv University,
69978 Tel Aviv, Israel
Received 27 October 1998; accepted for publication 14 December 1998
We demonstrate quasi-phase-matched difference frequency generation in periodically poled
KTiOPO4. A midinfrared 3.23.4 m idler with a power level of 0.17 W is generated by mixing
a Nd:YAG laser and tunable external cavity laser near 1550 nm which is amplified by an
erbium-doped fiber amplifier. The wavelength, temperature, and angle tuning characteristics of this
device are determined. The experimental results are used to derive a Sellmeier equation with
improved accuracy in the midinfrared range for the extraordinary refractive index of flux-grown
KTiOPO4. 1999 American Institute of Physics. S0003-6951 99 04007-3
There is considerable interest in developing sources in
the midinfrared range for selective and sensitive measure-
ments of trace-gas concentrations. Since the fundamental vi-
brational modes of most of the molecules lie in the 220 m
wavelength region, infrared spectroscopy using tunable
narrow-band sources provides a convenient and real-time

  

Source: Arie, Ady - Department of Electrical Engineering-Physical Electronics, Tel Aviv University

 

Collections: Engineering