Open AccessSecond harmonic generation of diamond-blade diced KTiOPO_4 ridge waveguides
Author(s) -
Chen Chen,
Christian E. Rüter,
Martin Völk,
Chen Cheng,
Zhen Shang,
Qingming Lu,
Shavkat Akhmadaliev,
Shengqiang Zhou,
Feng Chen,
Detlef Kip
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.016434
Subject(s) - materials science , wafer dicing , optics , second harmonic generation , ridge , fabrication , diamond , waveguide , nonlinear optics , wavelength , optoelectronics , laser , wafer , composite material , medicine , paleontology , physics , alternative medicine , pathology , biology
We report on the fabrication of ridge waveguides in KTiOPO 4 nonlinear 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 -1 and ~12.4% have been obtained for frequency doubling under the pump of continuous-wave (CW) and pulsed fundamental waves at 1064 nm, respectively.