Broadband signal and idler generation based on the spectral retracing behavior in noncollinear phase matching of optical parametric generation in periodically poled LiNbO<sub>3</sub> (PPLN) is reported. Using PPLN of 29.5-μm quasi-phase-matching period and a <i>Q</i>-switched Nd:YAG laser as a pump, we obtained a broad signal spectrum from 1.66 to 1.96 μm and corresponding idler wavelengths from 2.328 to 2.963 μm. The experimental results were consistent with theoretical predictions. Circular and elliptical pump beams were also compared.
© 2001 Optical Society of America
Chih-Wei Hsu and C. C. Yang, "Broadband infrared generation with noncollinear optical parametric processes on periodically poled LiNbO3," Opt. Lett. 26, 1412-1414 (2001)