Birefringence compensation, improved fringe contrast and trimming in an integrated asymmetric Mach-Zehnder interferometer using mid-IR laser processing

被引：9
|
作者：
Canning, J [1 ]
Åslund, M [1 ]
机构：
[1] Univ Sydney, Australian Photon Cooperat Res Ctr, Natl Innovat Ctr 101, Opt Fibre Technol Ctr, Sydney, NSW 1430, Australia
来源：
OPTICAL MATERIALS | 2000年 / 14卷 / 02期
基金：
澳大利亚研究理事会;
关键词：
ablation; birefringence; integrated optics; laser materials-processing applications; optical waveguides; photothermal effects;
D O I：
10.1016/S0925-3467(99)00127-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Tuning of an asymmetric Mach-Zehnder interferometer using mid-IR laser radiation is demonstrated. The device birefringence is compensated for by processing at the surface above one of the arms with 10.6 mu m light from a CO2 laser. The spectral contrast of the component is improved from similar to 7 to similar to 12 dB for the TE and TM eigenstates, respectively to similar to 20 dB for both eigenstates by balancing the optical energy in each arm before the output coupler. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：175 / 183
页数：9
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