Buried channel waveguides in neodymium-doped KGd(WO4)2 fabricated by low-repetition-rate femtosecond laser writing

被引：15
作者：
Liu, X. [1 ,2 ]
Qu, S. [1 ,2 ]
Tan, Y. [3 ]
Zhang, C. [3 ]
Chen, F. [3 ,4 ]
机构：
[1] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Dept Optoelect Sci, Weihai 264209, Peoples R China
[3] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China
[4] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2011年 / 103卷 / 01期
关键词：
REFRACTIVE-INDEX; GLASS;
D O I：
10.1007/s00340-010-4187-3
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Symmetric buried waveguides were fabricated in neodymium-doped KGd(WO4)(2) by using femtosecond laser writing in the low-frequency regime. Due to stress-induced index changes in the regions surrounding the focal spot, mode guidance was demonstrated and low propagation losses of similar to 0.2 dB/cm were obtained. Based on the comparison of the waveguides fabricated with different parameters, we present further significant analysis to get low-loss waveguides with symmetrical mode profiles. According to the reconstructed index profile, the mode distribution was numerically calculated by the beam propagation method, which showed a reasonable agreement with the experimental results.
引用
收藏
页码：145 / 149
页数：5
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