OPTICAL FREQUENCY TUNING BY LASER-IRRADIATION IN SILICA-BASED MACH-ZEHNDER-TYPE MULTI DEMULTIPLEXERS

被引：7
作者：
HIBINO, Y
KOMINATO, T
OHMORI, Y
机构：
[1] NTT Optoelectronics Laboratories
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 1991年 / 3卷 / 07期
关键词：
D O I：
10.1109/68.87939
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Optical frequency tuning due to photoinduced refractive-index changes is described in Mach-Zehnder interferometer-type frequency division multiplexers (FDM's) which are comprised of GeO2-silica-based waveguides on Si substrates. A maximum refractive-index change of about 4 x 10(-5) at 1.3-mu-m is obtained at an Ar+ laser power of 20 W and an irradiation time of 1 h. This leads to frequency tuning of more than half a period in FDM with a free spectral range of 25 GHz. In addition, the annealing effects on the refractive-index change are investigated.
引用
收藏
页码：640 / 642
页数：3
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