Optical isolator utilizing a micro-resonator

An optical isolator (10,20,200) for coupling light from a first waveguide to a second waveguide is disclosed. The optical isolator (10,20,200) utilizes a resonator (11,21,201) coupled to the first and second optical waveguides (12). The resonator (11,21,201) has a resonance at wavelength lambda for...

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Bibliographische Detailangaben
Hauptverfasser:	TAN, MICHAEL R.T, LEARY, MICHAEL H, TRUTNA, WILLIAM, BOUR, DAVID P
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSMISSION
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Beschreibung
Zusammenfassung:	An optical isolator (10,20,200) for coupling light from a first waveguide to a second waveguide is disclosed. The optical isolator (10,20,200) utilizes a resonator (11,21,201) coupled to the first and second optical waveguides (12). The resonator (11,21,201) has a resonance at wavelength lambda for light traveling from the first optical waveguide (13) to the second optical waveguide (12); however, the resonator (11,21,201) does not have a resonance at lambda for light traveling from the second waveguide to the first waveguide. The resonator (11,21,201) can use a layer (22,275) of ferromagnetic material (15) in an applied magnetic field. The magnetic field within the ferromagnetic material (15) varies in strength and/or direction over the layer (22,275) of ferromagnetic material (15). The magnetic field can be generated by an external magnetic field that varies over the layer (22,275) of ferromagnetic material (15). Alternatively, the resonator (11,21,201) can include a layer (22,275) of ferromagnetic metal that overlies a portion of the layer (22,275) of ferromagnetic material (15) and a constant external magnetic field.