Three-wave, second-order parametric processes with pump radiation in the near infrared (λ ≈ 1.5 μm) are investigated to generate tunable mid-infrared radiation in Ti:LiNbO3 channel waveguides. Difference-frequency generation has been obtained by using a tunable color-center laser (1.45 μm < λ < 1.6 μm) as the pump source and a He–Ne laser at λ = 3.39 μm as the idler source. The generated signal radiation is tunable from λ = 2.5 μm to λ =3.0 μm. Besides cw operation, the generation of picosecond pulses has been demonstrated.
© 1988 Optical Society of America
Original Manuscript: October 12, 1987
Manuscript Accepted: October 12, 1987
Published: February 1, 1988
H. Herrmann and W. Sohler, "Difference-frequency generation of tunable, coherent mid-infrared radiation in Ti:LiNbO3 channel waveguides," J. Opt. Soc. Am. B 5, 278-284 (1988)