Crosstalk reduction in a 10-GHz spacing arrayed-waveguide grating by phase-error compensation

被引:23
作者
Yamada, H [1 ]
Takada, K [1 ]
Mitachi, S [1 ]
机构
[1] NTT Corp, Optoelect Labs, Tokai, Ibaraki 31911, Japan
关键词
optical crosstalk; optical planar waveguides; phased arrays; phase measurement; wavelength division multiplexing;
D O I
10.1109/50.661362
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
The crosstalk in arrayed-waveguide grating multiplexers with a channel spacing of 10 GHz is reduced by compensating for the phase errors after fabrication. We used the thermooptic effect realized with a thin-film heater and the photoelastic effect obtained with amorphous silicon film, respectively, for dynamic and static phase-error compensation. These two methods were applied to confirm the principle and to realize a stable, stand-alone device, respectively. We have achieved a crosstalk of less than -35 dB for the TE polarization mode in a 16 x 16, 10 GHz-spacing arrayed-waveguide grating by using these two phase-error compensation techniques. Static phase-error compensation results in a stable multiplexer which features a low crosstalk of less than -30 dB for one of the two polarization modes of all the channels without any external control equipment.
引用
收藏
页码:364 / 371
页数:8
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