标题：Guided-wave phase-matched second-harmonic generation in KTiOPO4 waveguide produced by swift heavy-ion irradiation
作者：Cheng, Yazhou; Jia, Yuechen; Akhmadaliev, Shavkat; Zhou, Shengqiang; Chen, Feng
作者机构：[Cheng, Yazhou; Jia, Yuechen; Chen, Feng] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China.; [Cheng, Yazhou; Jia, Y 更多
通讯作者地址：[Chen, F]Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China.
关键词：optical waveguides; second-harmonic generation; KTiOPO4 nonlinear; crystals; swift heavy-ion irradiation; phase matching
摘要：We report on the guided-wave second-harmonic generation in a KTiOPO4 nonlinear optical waveguide fabricated by a 17 MeVO5+ ion irradiation at a fluence of 1.5 x 10(15) ions/cm(2). The waveguide guides light along both TE and TM polarizations, which is suitable for phase-matching frequency doubling. Second harmonics of green light at a wavelength of 532 nm have been generated through the KTiOPO4 waveguide platform under an optical pump of fundamental wave at 1064 nm in both continuous-wave and pulsed regimes, reaching optical conversion efficiencies of 5.36%/W and 11.5%, respectively. The propagation losses have been determined to be similar to 3.1 and similar to 5.7 dB/cm for the TE and TM polarizations at a wavelength of 632.8 nm, respectively. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)