Ultra fast optical signal processing using arrayed waveguide grating

基于时-空转换的超短光脉冲整形技术在自由空间光学中得到了广泛的应用。我们提出了使用阵列波导光栅进行时空转换光信号处理。阵列波导光栅系统具有时间窗长、可处理亚皮秒到几皮秒脉冲的优点。此外，它结构紧凑，与光纤兼容，并可与功能光子器件集成。介绍了该技术在太比特通信系统中的应用，如脉冲整形、色散补偿、光学COM编码器和解码器等。此外，我们还提出了一种利用硅图像传感器的双光子吸收过程测量短光脉冲波形的新方法。结果表明，图像传感器成功捕获了波长为1550nm的红外图像。在此基础上，我们构建了一种带有倾斜参考镜的迈克尔逊干涉仪，用于瞬时测量光脉冲的自相关波形，无需扫描机制。

Ultra-short optical pulse shaping based on time-space conversion has been widely demonstrated by using free-space optics with diffraction grating pairs and lenses. We have proposed time-to-space conversion optical signal processing using an arrayed waveguide grating. The arrayed-waveguide grating system has the advantages of a long time window, and well suites to handle subpico- to several picosecond pulses. Moreover, it is compact, compatible with fiber optics, and can be integrated with functional photonic devices. We introduce several applications of this technology to terabit communication systems, such as pulse shaping, dispersion comp ensation, and optical COM encoder and decoder. Furthermore, we proposed a novel method for measuring the waveform of short optical pulses, which uses two-photon absorption process hi a silicon image sensor. We confirmed that infrared ^ht images with 1550nm wavelength were successfully, captured by the image sensor. Then we constructed a Michelson interferometer with a tilted reference mirror for measuring autocorrelation wave forms of optical pulses instantaneously without scanning mechanism.