Improved second harmonic performance in periodically poled LNOI waveguides through engineering of lateral leakage

被引：56
|
作者：
Boes, Andreas [1 ,2 ]
Chang, Lin [2 ]
Knoerzer, Markus [1 ]
Nguyen, Thach G. [1 ]
Peters, Jon D. [2 ]
Bowers, John E. [2 ]
Mitchell, Arnan [1 ]
机构：
[1] RMIT Univ, Sch Engn, Melbourne, Vic 3000, Australia
[2] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
来源：
OPTICS EXPRESS | 2019年 / 27卷 / 17期
基金：
澳大利亚研究理事会;
关键词：
LITHIUM-NIOBATE; THIN-FILM; GENERATION;
D O I：
10.1364/OE.27.023919
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this contribution, we investigate the impact of lateral leakage for linear and nonlinear optical waveguides in lithium niobate on an insulator (LNOI). Silicon nitride (SiN) loaded and direct patterned lithium niobate cross-sections are investigated. We show that lateral leakage can take place for the TE mode in LNOI ridge waveguides (X-cut lithium niobate), due to the birefringence of the material. This work gives guidelines for designing waveguides in LNOI that do not suffer from the lateral leakage effect. By applying these design considerations, we avoided the lateral leakage effect at the second harmonic wavelength of a nonlinear optical waveguide in LNOI and demonstrate a peak second harmonic generation conversion efficiency of similar to 1160% W(-1)cm(-2). (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：23919 / 23928
页数：10
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