Study of ultra-high-speed optical signal processing circuits for photonic network system

采用波分复用技术的下一代光网络迫切需要对复杂的光信号进行无电处理。本文的研究目的是实现高性能、高速的集成小相位调制器和幅度调制器的低相位误差光处理电路：1.实现了由阵列波导光栅构成的任意波形发生器，其通道间距为12.5GHz，30个通道，串扰小于-20dB;每个通道集成了消光比为20 dB、最大相位调制为2π的幅度调制器。监控相邻通道信号之间的差拍波形的反馈系统被配置为生成任意波形。设计了单片色散补偿电路，并成功实现了40 Gbit/s信号退化波形的恢复。3.提出并制作了多级箭头型阵列波导光栅。中心频率处的损耗对于三级类型为7.5dB，对于五级类型为17 dB。我们还制作了通道间距为25 GHz的高分辨率阵列波导光栅和通道间距为100 GHz的宽范围阵列波导光栅。

Complicated photonic signal processing without electrical processing is strongly required for the next generation photonic network using wavelength division multiplexing technology. The purpose of this study was the realization of high-performance and high-speed photonic processing circuits integrated with small phase modulators and amplitude modulators with low-phase error waveguides.1.We have realized arbitrary wave form generator consisted of the arrayed-waveguide grating with a channel spacing of 12.5 GHz, 30 channels, and a crosstalk of less than -20 dB ; and amplitude modulators with an extinction ratio of 20 dB, and the maximum phase modulation of 2π were integrated to each channel. The feedback system which monitored the beat wave form between adjacent channel signals was configured to generate arbitrary waveform. The system could generate the transform limited pulse.2.We have fabricated the monolithic dispersion compensation circuit and successfully demonstrated the recovery of the degraded waveform of the 40 Gbit/s signals.3.The multi-stage arrowhead type arrayed-waveguide grating was proposed and fabricated. The loss at the center frequency was 7.5 dB for three-stage type, and was 17 dB for five-stage one. We have also fabricated the high-resolution arrayed-waveguide grating with a channel spacing of 25 GHz, and the wide range arrayed-waveguide grating with a channel spacing of 100 GHz.