Optical Fiber Device Research

对新型无源和有源光纤器件的技术和应用进行了研究。无源器件的研究将建立在最近的发现之上，即电介质反射镜可以通过熔融拼接在连续长度的硅纤维中产生。在各种候选材料中，将研究产生反射镜时发生的相互扩散过程。多层薄膜将用于获得高反射率。新型输入输出耦合器和直列偏振器将使用角度反射镜生产。探讨单模光纤法布里-珀罗干涉仪作为温度和应变传感器的应用。来自光纤反射镜的反馈将用于二极管激光的稳频、线窄和锁模。声光相位调制器，其中光纤本身作为一个圆柱形的声学谐振器也将被研究。光纤表面的氧化锌换能器将由射频信号源驱动产生驻声波，该驻声波通过应变光学效应调制导光。将使用这些调制器进行相干通信演示。

The technology and application of novel passive and active fiber optic devices will be investigated. Research in passive devices will build upon the recent discovery that dielectric mirrors can be produced in a continuous length of silica fiber by fusion splicing. The interdiffusion process which occurs when the mirrors are produced will be studied for a variety of candidate materials. Multilayer films will be used to obtain high reflectance. Novel input-output couplers and in-line polarizers will be produced using angled mirrors. Fabry- Perot interferometers in single-mode fiber will be explored for application as temperature and strain sensors. Feedback from fiber mirrors will be used for diode laser frequency stabilization, line narrowing and mode locking. Acoustooptic phase modulators in which the fiber itself serves as a cylindrical acoustic resonator will also be investigated. A zinc oxide transducer on the fiber surface will be driven from an rf signal source to produce a standing acoustic wave which modulates the guided light via the strain-optic effect. A coherent communication demonstration will be carried out using these modulators.