Femtosecond Laser Micromachining of Cladding Waveguides in KTiOAsO4 Crystal for Second-Harmonic Generation

被引：3
作者：
Li, Genglin [1 ]
Zhang, Bin [1 ]
Sun, Lifei [2 ,3 ]
Ren, Yingying [2 ,3 ]
Jia, Yuechen [1 ]
Chen, Feng [1 ]
机构：
[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[2] Shandong Normal Univ, Sch Phys & Elect, Shandong Prov Engn & Tech Ctr Light Manipulat, Jinan 250014, Peoples R China
[3] Shandong Normal Univ, Sch Phys & Elect, Shandong Prov Key Lab Opt & Photon Device, Jinan 250014, Peoples R China
来源：
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2021年 / 15卷 / 11期
关键词：
birefringent phase matching; cladding waveguides; femtosecond laser micromachining; KTA nonlinear optical crystals; second-harmonic generation; FREQUENCY-CONVERSION; HIGH-POWER; WRITTEN; KTP; GRAPHENE; NM;
D O I：
10.1002/pssr.202100345
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Second-harmonic generation (SHG) of green lasers generated in KTiOAsO4 (KTA) cladding waveguides fabricated by femtosecond laser direct writing (FsLDW) is reported. The minimum propagation loss of the fabricated waveguides is determined to be 2.39 +/- 0.24 dB cm(-1) at 1064 nm. The SHG performance is characterized by utilizing a 1064 nm pulsed laser. The maximum SHG conversion efficiency reaches 13.67%. This work suggests potential applications of KTA crystals and FsLDW technology in definition of compact waveguide devices for integrated nonlinear optics.
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页数：7
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