公开(公告)号：US20020060826A1

公开(公告)日：2002-05-23

申请号：US09974826

申请日：2001-10-12

Applicant: Optellios Inc.

Inventor： Jay S. Patel ,  Zhizhong Zhuang

IPC: H04J014/06 ,  H04B010/00

CPC classification number: H04J14/02 ,  H04B10/532

Abstract: An optical polarization encoding been invented which allows wavelength dependent processing of polycromatic opticals without prior separation into narrow wavelength bands. The invention comprises a stack of variable and fixed birefringent elements which introduces, on passage though the stack, wavelength dependent polarization onto a polycromatic optical signal of arbitrary polarization. Desired polarizations are achieved simultaneously at all wavelengths contained within the incoming signal by independently varying the birefringence and/or crystallographic orientation of each element within the stack. The encoded signal may be subsequently be processed, e.g. rerouted or attenuated, as a function of wavelength using polarization dependent devices. The encoding stack is rendered polarization insensitive by dividing the incoming optical signal, with a polarization beam splitter, into two beams of orthogonal polarization prior to passage through the stack.

Abstract translation: 已经发明了一种光偏振编码，其允许多色光学器件的波长相关处理，而无需先前分离成窄波段。 本发明包括可变和固定双折射元件的堆叠，其在通过堆叠时将波长相关极化引入到任意偏振的多色光信号上。 通过独立地改变堆叠内的每个元件的双折射和/或晶体取向，在输入信号中包含的所有波长同时实现期望的偏振。 编码信号可以随后被处理，例如， 使用偏振相关器件作为波长的函数被重新路由或衰减。 通过将入射光信号与偏振分束器分离成通过堆叠之前的两束正交偏振，使得编码堆叠变得不偏振。