MAGNETOOPTIC BURIED-CHANNEL WAVE-GUIDES FOR A 45-DEGREES NONRECIPROCAL WAVE-GUIDE ROTATOR

被引:8
作者
SUGIMOTO, N
KATOH, Y
TATE, A
机构
[1] Opto-Electronics Laboratories, Nippon Telegraph and Telephone Corporation, Tokai-mura, Naka-gun
关键词
D O I
10.1063/1.110321
中图分类号
O59 [应用物理学];
学科分类号
摘要
An optical isolation ratio of -21.1 dB at lambda = 1.55 mu m is obtained for a LPE-grown La and Ga substituted YIG single-mode buried channel waveguide. Waveguides about 3 mm long end-butted to single-mode fibers show an overall insertion loss of less than 2 dB. The Ar ion-beam etching technique using a three layered etching mask provides sufficient control of both the width (similar to 4 mu m) and height (similar to 4 mu m) of the core ridge. The core and cladding layers are individually grown from melts with different compositions in order to reduce stress-induced birefringence. The good reproducibility with which 45 degrees waveguide rotators exhibiting a circular near-field intensity pattern can be fabricated will enable us to realize optical integration in future systems.
引用
收藏
页码:2744 / 2746
页数:3
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