波导光折变功能光栅的研究

提出一种新的波导光折变功能光栅制作技术，利用导波光与空间光干涉，在Ｔｉ：ＬｉＮｂＯ３条形波导中通过光折变效应形成波导功能光栅，该方法也适用制作浮雕型波导光栅，用该方法，可制备周期小于二分之一光波长的光栅，并可灵活地调节波导功能光栅的形成与工作波长。

Study of Photorefractive Functional Waveguide-Grating

With the development of optical fiber communication, the photorefractive functional waveguie gratings are being widely utilized in a great variety of devices and systems. A novel two-beam holographic approach, including a space beam and a guided-wave beam, for fabricating a photorefractive grating on Ti:LiNbO3 channel waveguides is proposed. The theoretical analysis of the experiemntal results show that the approach is practical and effective. This approach can be also used for fabricating the surface-relief waveguide gratings. It is a flexible means to fabricate various functional gratings with a grating-period shorter than the half-wavelength of the exposure light and the chirped-grating.