Abstract

Devices based on difference-frequency generation (DFG) in channel waveguides are an attractive alternative to cryogenically cooled lasers for the production of tunable, narrowband radiation in the midinfrared. In previous work we described such a device, incorporating a periodically segmented taper¹ to ensure single-mode excitation of the waveguide, which was used to detect atmospheric water vapor at 2.8 μm.²

© 2000 Optical Society of America