Patent · US Expired

Optical comb filter

US6301409A · kind A · utility

5Cited by

2References

9Claims

0Family size

Assignee

Nortel Networks Limited · CA

Inventors

James Whiteaway · Sawbridgeworth, GB
George H. B. Thompson · Sawbridgeworth, GB
Terry Bricheno · Plympton, GB

Key dates

Filing date	Dec 23, 1999
Grant date	Oct 9, 2001
Priority date	—
Expiry date	Dec 23, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/12021
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An optical comb filter is constructed from a monolithic arrangement of two identical integrated optics format arrayed waveguide diffraction gratings connected back-to-back via a star coupler incorporating a field stop (spatial filter0. Alternatively, only one of the diffraction gratings is employed in conjunction with a combined field stop and retro-reflector, the other end of the diffraction grating being optically coupled with one port of an optical circulator.

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