Optical waveguides – Polarization without modulation
Patent
1990-02-16
1991-10-22
Arnold, Bruce Y.
Optical waveguides
Polarization without modulation
385130, 359484, G02F 1025, G02F 1095
Patent
active
050589717
ABSTRACT:
The invention relates to a planar optical isolator having a magneto optical gyrotropic layer and an anisotropic birefringent layer which are proportioned so that the non-reciprocal rotation of polarisation of the light (Faraday rotation) resulting from the action of a magnetic field in the forward direction of the isolator is at least substantially negatively equal to the reciprocal rotation of polarisation as a result of the birefringence, so that a TE-mode in the forward direction is guided with low damping, measures being taken for the intensive attenuation of at least one TM-mode. An isolator having a high isolating effect in which magneto optical gyrotropic layers and anisotropic birefringent layers can be connected epitaxially is obtained in that the waveguiding core layer comprises two rare earth-iron garnet (YIG) layers which are differently doped to obtain different specific birefringence.
REFERENCES:
patent: 3830555 (1974-08-01), Warner
patent: 4032216 (1977-06-01), Henry
patent: 4522473 (1985-06-01), Hibiya et al.
patent: 4746182 (1988-05-01), Dammann et al.
patent: 4859013 (1989-08-01), Schmitt et al.
Castera et al., "Isolator in Integrated Optics Using the Faraday and Cotton-Mouton Effects", IEEE Transactions on Magnetics, vol. Mag-13, No. 5, Sep. 1977, pp. 1583 to 1585.
Henry, "Thin-Film Optical Magnetic Mode Converters", Applied Physics Letters, vol. 26, No. 7, pp. 408-411, Apr. 1, 1974.
Hepner et al., "Studies of Magnetooptical Effects in Garnets Thin Film Waveguides", Alp Conference Proceedings, No. 29, pp. 658-659, 1976.
Semileaky Thin-Film Optical Isolator, Journal of Applied Physics, 52(5), May 1981, pp. 3190-3199.
Design Feasibility of a Single Mode Optical Isolator, IEEE Journal of Quantum Electronics, vol. QE-18 (1982), Nov., No. 11, pp. 1975-1981.
"Gyrotropic Waveguides", Academic Press, 1981, pp. 52-53, by Paul Hlawiczka.
Dammann Hans
Doormann Volker
Krumme Jens-Peter
Schmitt Hans-Jurgen
Seidenberg Jurgen
Arnold Bruce Y.
Botjer William L.
Lerner Martin
U.S. Philips Corp.
LandOfFree
Planar optical isolator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Planar optical isolator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planar optical isolator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-104642