title: Second harmonic generation of diamond-blade diced KTiOPO4ridge waveguides.
abstract: We report on the fabrication of ridge waveguides in KTiOPO4nonlinear optical crystals through carbon ion irradiation followed by precise diamond blade dicing. The diced side-walls have low roughness, which allows for low propagation loss of ~1dB/cm in fabricated of ridges. The waveguide property investigation has been performed at 1064 nm as well as 532 nm, showing good guidance at both TE and TM polarizations. Based on type II phase matching configuration, efficient second harmonic generation of green light at room temperature has been realized. High conversion efficiencies of ~1.12%W-1and ~12.4% have been obtained for frequency doubling under the pump of continuous-wave (CW) and pulsed fundamental waves at 1064 nm, respectively.
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.forename: Christian E
authors.initials: CE
authors.lastname: Rüter
authors.forename: Martin F
authors.initials: MF
authors.lastname: Volk
authors.forename: Cheng
authors.initials: C
authors.lastname: Chen
authors.forename: Zhen
authors.initials: Z
authors.lastname: Shang
authors.forename: Qingming
authors.initials: Q
authors.lastname: Lu
authors.forename: Shavkat
authors.initials: S
authors.lastname: Akhmadaliev
authors.forename: Shengqiang
authors.initials: S
authors.lastname: Zhou
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Detlef
authors.initials: D
authors.lastname: Kip