Fiber Bragg gratings have been invented for over three decades now and have been intensively employed in optical communication and sensor systems. The key limitation of a fiber Bragg grating is that once fabricated, it is hard to be tuned or with very limited tunability via thermal or mechanical tuning. Recently, great efforts have been directed into the study of realizing Bragg gratings on silicon-on-insulator (SOI) platform. The key advantage of Bragg gratings based on SOI is that the gratings can be fast and electrically reconfigured with the use of free-carrier plasma dispersion effect in silicon, which can be employed for fast programmable photonic signal processing. In this article, Bragg gratings based on SOI that are electrically programmable will be reviewed and their use for advanced programmable optical and microwave signal processing will be discussed.

中文翻译：

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用于可编程光子信号处理的完全可重构波导布拉格光栅

光纤布拉格光栅已经发明了三十多年，并且已经在光通信和传感器系统中得到广泛应用。光纤布拉格光栅的主要限制在于，一旦制成，就很难通过热或机械调谐进行调谐或可调谐性非常有限。最近，在绝缘体上硅（SOI）平台上实现布拉格光栅的研究已投入大量精力。基于 SOI 的布拉格光栅的主要优势在于，可以通过使用硅中的自由载流子等离子体色散效应快速和电气地重新配置光栅，这可用于快速可编程光子信号处理。在本文中，