Abstract

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

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