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一、引言光学滤波器被广泛地应用于光纤通信,民用高科技产品中的光电显示,航空航天以及军事技术当中。是一类非常重要的光无源器件,由于它的功能不可替代,而且用量较大,所以已形成了一个新兴产业。所谓光学滤波器,即光频选择器。它能使某一光频通过而使其它光频被阻断。正因为它具有这种功能,可使混合的光波——被分开,变成单一频率的光波。光纤通信复用系统中所用的光解复用器就是利用这种原理将复用的混合波被解复用为单一的光载波。
I. INTRODUCTION Optical filters are widely used in optical fiber communications, optoelectronic displays in civilian high-tech products, aerospace and military technology. Is a very important class of optical passive devices. Due to its irreplaceable function and large amount of applications, it has formed a new industry. The so-called optical filter, that is, optical frequency selector. It can make a light frequency and other light frequency is blocked. Precisely because of this function, mixed light waves are separated into light waves of a single frequency. The optical fiber demultiplexer used in the optical fiber communication multiplex system utilizes the principle that the multiplexed mixed wave is demultiplexed into a single optical carrier.