Development of High Efficient, Compact, Robust and Tunable IR and Terahertz Light Sources using Periodically Polled Frequency Conversion Devices

摘要

A tunable IR wavelength conversion device using quasi-phase-matched (QPM) optical parametric generation was optimized for wavelength, compactness and environmentally less sensitive. Although the IR light source can be applied for various fields, the research was targeted toward dental surgical applications for the removal of hard enamel, dentine and bone tissues and at the same time developing a new capability for use in other tunable IR laser research and applications to interfacial media and biological sciences. The project goals consisted of: (1) setting up the polarization switching system to fabricate QPM devices, (2) assembling the Mg: stoichiometric lithium tantalate based QPM devices, (3) setting up a new experimental capability to generate tunable light around 2.78/956;m by the OPO system, (4) evaluating the OPO performances in terms of maximum power, efficiency, temperature dependence, and tenability, (5) fabricating wide aperture OPO devices optimized by the applications.