抄録
Waveguide-type quasi-phase matched (QPM) nonlinear-optic devices offer numerous applications in optoelectronics area. Wavelength converters based on QPM difference frequency generation (DFG) have advantages of wide wavelength coverage, wide bandwidth, high efficiency, high transparency for various data format, low noise and integration compatibility. Various ultrafast optical signal processing such as optical sampling and optical gate switching can also be performed. Recent progress in this subarea is reviewed with emphasis on research work of the author’s group using LiNbO3 QPM waveguides.
