Patent · US Active

Optical differential group delay module with folded optical path

US7723670B1 · kind B1 · utility

7Cited by

91References

20Claims

0Family size

Assignee

General Photonics Corporation · US

Inventors

Lianshan Yan · Los Angeles, US
Xiaojun Chen · Shanghai, CN
Xiaotian Steve Yao · Diamond Bar, US

Key dates

Filing date	Mar 26, 2008
Grant date	May 25, 2010
Priority date	—
Expiry date	Mar 26, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/0136
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Differential group delay (DGD) devices and techniques based on folded optical paths. An in-line polarization monitor can be provided as a feedback for worst-case alignment without using an in-line polarizer. Polarization maintaining retro reflectors can minimize the introduced higher-order polarization effects caused by reflections between folding mirrors or prisms in conventional schemes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.