title: Enhanced terahertz-wave parametric generation and oscillation in lithium niobate waveguides at terahertz frequencies.
abstract: We observed parametric-generation efficiency of 1.61% from 1064 to 1071 nm and at 162 microm in a 0.5 mm thick, 45 mm long z-cut congruent lithium niobate waveguide with a pump energy of 2.2 mJ and a pump pulse width of 5.8 ns. We also measured an ultralow-threshold intensity of 70 MW/cm2 for a 1064 nm pumped parametric oscillator resonating at 1071 nm and emitting at 162 microm with a 1 mm thick, 45 mm long lithium niobate waveguide.
authors.affiliation: Institute of Photonics Technologies, Department of Electrical Engineering, National Tsinghua University, Hsinchu 300, Taiwan.
authors.forename: A C
authors.initials: AC
authors.lastname: Chiang
authors.forename: T D
authors.initials: TD
authors.lastname: Wang
authors.forename: Y Y
authors.initials: YY
authors.lastname: Lin
authors.forename: S T
authors.initials: ST
authors.lastname: Lin
authors.forename: H H
authors.initials: HH
authors.lastname: Lee
authors.forename: Y C
authors.initials: YC
authors.lastname: Huang
authors.forename: Y H
authors.initials: YH
authors.lastname: Chen