Optical: systems and elements – Polarization without modulation – By relatively adjustable superimposed or in series polarizers
Patent
1995-08-10
1997-11-25
Dzierzynski, Paul M.
Optical: systems and elements
Polarization without modulation
By relatively adjustable superimposed or in series polarizers
359484, 359495, 385 11, 385 15, G02B 530
Patent
active
056918453
ABSTRACT:
In an optical isolator including first and second birefringent plates whose optical axes are angularly different and a Faraday rotator inserted therebetween having a Faraday rotation angle of .theta..sub.f, (1) the angles of the optical axes of the first and second birefringent plates are so set that a forward incident polarized light passes through the first and second birefringent plates both as ordinary lights or both as extraordinary lights, and the relationship .theta..sub.f +.phi..sub.eff =90.degree. is satisfied when an actually used incident polarized light is incident in an oblique direction, or (2) the angles of the optical axes of the first and second birefringent plates are so set that a forward incident polarized light passes through one of the first and second birefringent plates as an ordinary light and the other birefringent plate as an extraordinary light, and the relationship .theta..sub.f -.phi..sub.eff =0.degree. is satisfied. Alternatively, cases when the magnetization of the Faraday rotator is reversed are compared and the direction of the magnetization which satisfies (1) and (2) as close as possible is selected. A good isolation is obtained by the present invention.
REFERENCES:
patent: 4375910 (1983-03-01), Seki
patent: 5315431 (1994-05-01), Masuda et al.
patent: 5359689 (1994-10-01), Iwatsuka et al.
patent: 5381261 (1995-01-01), Hirai et al.
patent: 5446813 (1995-08-01), Lee et al.
Kazuyoshi Sato et al.; 1988 Spring Meeting of the "Society of Electronic Information and Communication of Japan," Article No. C-477, pp. 1-447.
Hata Kenjiro
Iwatsuka Shinji
Kanagawa Yoichi
Sekijima Makoto
Dzierzynski Paul M.
Schaberg Darren E.
TDK Corporation
LandOfFree
Optical isolator, optical isolator with fiber and method for mak does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical isolator, optical isolator with fiber and method for mak, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical isolator, optical isolator with fiber and method for mak will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2111766