Thermally controllable optical devices

A thermally controllable optical device includes a body of light transmitting material (12) forming an optical resonant cavity structure for a light beam (16) transmitted through said body, wherein the material of the body is such that the resonant characteristics of the device vary with the tempera...

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Bibliographische Detailangaben
Hauptverfasser:	MCMAHON DONALD H, DYES WILLIAM A
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 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
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Beschreibung
Zusammenfassung:	A thermally controllable optical device includes a body of light transmitting material (12) forming an optical resonant cavity structure for a light beam (16) transmitted through said body, wherein the material of the body is such that the resonant characteristics of the device vary with the temperature. An electrical current circuit (26) develops thermal energy to said body sufficient to vary its resonant characteristics. Said body (12) comprises a light guiding channel formed on a substrate having deposited thereon an electrically conductive coating connected to said current circuit. In an alternative form said body comprises a light guiding channel formed within a substrate having deposited thereon an electrically conductive coating connected to said current circuit, wherein said light guiding channel having a relatively higher index of refraction than that of said substrate.