Farady rotation device and optical device comprising it

Details Farady rotation device and optical device comprising it Farady rotation device and optical device comprising it

2005-04-05

2005-04-05

Dang, Hung Xuan (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S281000, C359S282000, C359S283000

Reexamination Certificate

active

06876480

ABSTRACT:
Optical devices including a Faraday rotation devices improved in wavelength and temperature characteristics and an optical attenuator reduced in wavelength dependence and temperature-dependent loss. The Faraday rotation device has permanent magnets magnetized in an axial direction of through-holes, and Faraday elements having a same Faraday rotation direction with respect to a same magnetization direction. The permanent magnets are directed in the same magnetization direction along an optical path, where part of the Faraday elements are accommodated in the through-hole of the permanent magnet, and the remaining Faraday elements are arranged between the magnets, whereby the Faraday elements are to be applied by magnetic fields in opposite directions. For a device variable in Faraday rotation angle, an electromagnet is provided. An input fiber collimator and polarizer are provided on an input side of with the Faraday elements while an analyzer and output fiber collimator are on an output side.

REFERENCES:
patent: 4856878 (1989-08-01), Wilson et al.
patent: 5889609 (1999-03-01), Fukushima
patent: 5973821 (1999-10-01), Onaka et al.
patent: 6339492 (2002-01-01), Terahara et al.
patent: 0 279 412 (1988-08-01), None
patent: 0 932 067 (1999-07-01), None
patent: 55-138711 (1980-10-01), None
patent: 64-20521 (1989-01-01), None
patent: 1-142525 (1989-06-01), None
patent: 3-2819 (1991-01-01), None
patent: 4-366913 (1992-12-01), None
patent: 6-317763 (1994-11-01), None
patent: 10-301070 (1998-11-01), None
patent: 11-231274 (1999-08-01), None
patent: 11-311716 (1999-11-01), None
patent: 2000-249997 (2000-09-01), None
patent: 2000-305057 (2000-11-01), None

Affiliated with

Also associated with

Rating

Farady rotation device and optical device comprising it does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Farady rotation device and optical device comprising it, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Farady rotation device and optical device comprising it will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3432036