OPTICAL SWITCH

• Main Author: ISHII TOSHIHIRO
• Format: Patent
• Language: English
• Published: 01.02.2007
• Subjects: 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 LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a small-sized optical switch system which can have a large ON/OFF ratio of light, and to provide a manufacturing method thereof as to an optical switch used for a device which switches the light of a projector, optical communication, etc. SOLUTION: A sintered material of PLZT is used for a defect layer 3 and by polishing it is made into a thin film. Its thickness (d) is determined by satisfying a prescribed relation with the refractive index (n) of the material of the defect layer, to obtain a transmissivity spectral half-value width Wt, with which ample extinction ratio can be obtained, even if the half-value width is about 1 nm for spectrum when an LD is an incident light. COPYRIGHT: (C)2007,JPO&INPIT