Optical: systems and elements – Optical modulator – Having particular chemical composition or structure
Patent
1995-07-05
1997-03-04
Epps, Georgia Y.
Optical: systems and elements
Optical modulator
Having particular chemical composition or structure
359281, 428900, G02F 100
Patent
active
056085702
ABSTRACT:
Garnet material according to the invention exhibits a substantially rectangular magnetization loop, with .vertline.H.sub.S .vertline.>.vertline.4.pi.M.sub.S .vertline.Oe, where H.sub.S is the switching magnetic field of the loop, and 4.pi.M.sub.S is the saturation magnetization. The material exhibits "latching" behavior, and can advantageously be used in magneto-optic isolators and other magneto-optic devices. For instance, the material enables manufacture of isolators that do not contain a permanent magnet. An exemplary garnet according to the invention has nominal composition Bi.sub.0.75 Eu.sub.1.5 Ho.sub.0.75 Fe.sub.4.1 Ga.sub.0.9 O.sub.12.
REFERENCES:
patent: 5198297 (1993-03-01), Tanno et al.
"Optical Isolators for Optical Communication Systems", by S. Makio et al., Electronics and Communications in Japan, Part 2, vol. 74, No. 2, 1991.
"Magnetless Faraday Rotator of (BiY).sub.3 Fe.sub.5 O.sub.12 Waveguide with Stripe Magnetic Domains", by K. Matsuda et al., Applied Physics Letters, vol. 59(5), p. 507 Jul. (1991).
"Magnetic Garnets", by G. Winkler, Vieweg, Germany (1981).
"Recent Advances of Bismuth Garnet Materials Research for Bubble and Magneto-Optical Applications", by P. Hansen et al., IEEE Transaction on Magnetics, vol. MAG-20, No. 5, Sep. 1984.
"The Physical Principles of Magnetism", by A. H. Morrish, J. Wiley and Sons, New York, 1965, pp. 332-340.
"Fiber Optics", Mitsubishi Gas Chemical Company, Inc., 1995, p. 5.
"Large Stable Magnetic Domains", by G. R. Pulliam et al., J. Appl. Phys., vol. 53(3), Mar. 1982, pp. 2754-2758.
Brandle, Jr. Charles D.
Fratello Vincent J.
Licht Steven J.
Bey Dawn-Marie
Epps Georgia Y.
Lucent Technologies - Inc.
Pacher Eugen E.
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