Three-port optical circulator

Details Three-port optical circulator Three-port optical circulator

1999-01-27

2001-10-09

Spyrou, Cassandra (Department: 2872)

Optical: systems and elements

Polarization without modulation

Polarization using a time invariant electric, magnetic, or...

C359S494010, C359S490020, C359S490020, C359S490020, C359S900000, C385S011000

Reexamination Certificate

active

06301045

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of The Invention
The invention relates to circulators, and particularly to the fiber optic circulator with simple structures thereof.
2. The Related Art
An fiber optic circulator is designed to provide a non-reciprocal multi-port optical device which allows the forward light beam and the backward light beam to travel therethrough in different paths. Therefore, in a three ports fiber optic circulator the light beam coupled into the first port will propagate out from the second port and the light beam coupled into the second port will propagate out from the third port. Anyhow, the traditional circulator has complicated structures and parts. The theory and application of the circulator can be referred to the publication of “Optical Waves in Crystals” having the authors of Amnon Yariv and Pochi Yeh, and U.S. Pat. Nos. 5,574,596, 5,581,640, 5,631,771, 5,661,829, 5,689,593 and 5,734,762.
Therefore, an object of the invention is to provide an inexpensive device with simplified structures thereof for achieving the same function.
SUMMARY OF THE INVENTION
According to an aspect of the invention, a circulator includes first and second collimating devices with three external optic fibers theron wherein the first optic fiber and the third optic fiber are coupled to the second collimating device while the second external optic fiber is coupled to the first collimating device. The non-reciprocal section includes a first optic isolator section and a second optic isolator section commonly sandwiching a first light deflecting device therebetween, and a second light deflecting device being positioned between the second optic isolator section and the second collimating device. Therefore, a first light beam through the first optic fiber entering the second collimating device, may exit through the first collimating device by the second optic fiber, while a second light beam through the second optic fiber entering the first collimating device, may exit through the second collimating device by the third fiber, wherein the first light beam and the second light beam propagate opposite to each other.


REFERENCES:
patent: 3442571 (1969-05-01), Itzkan
patent: 4464022 (1984-08-01), Emkey
patent: 4556292 (1985-12-01), Mathyssek et al.
patent: 5471340 (1995-11-01), Cheng et al.
patent: 5581640 (1996-12-01), Pan et al.
patent: 5734763 (1998-03-01), Chang
patent: 5909310 (1999-06-01), Li et al.
patent: 5973832 (1999-10-01), Bettman
patent: 5982539 (1999-11-01), Shirasaki
patent: 5991076 (1999-11-01), Cheng
patent: 6011649 (2000-01-01), Chang
patent: 6026202 (2000-02-01), Chang
patent: 6049426 (2000-04-01), Xie et al.
patent: 6088491 (2000-07-01), Sorin et al.
patent: 6111695 (2000-08-01), Lee et al.
patent: 2038022 (1980-07-01), None
patent: 0102621 (1986-05-01), None
patent: 0200319 (1987-09-01), None
patent: 404310915A (1992-11-01), None
patent: 406242401A (1994-09-01), None

Affiliated with

Also associated with

Rating

Three-port optical circulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Three-port optical circulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-port optical circulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2617204