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THERMOOPIC TYPE VARIABLE OPTICAL ATTENUATOR AND ARRAY TYPE VARIABLE OPTICAL ATTENUATOR USING THIS
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Title:
THERMOOPIC TYPE VARIABLE OPTICAL ATTENUATOR AND ARRAY TYPE VARIABLE OPTICAL ATTENUATOR USING THIS
Author:
LAI, GUANMING
;
JIANG, XIAOQING
;
WU, YUYING
;
WANG, MINGHUA
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
Description:
A thermooptic type variable optical attenuator applicable to an array type variable optical attenuator that realizes a low cross talk between adjacent waveguide arrays. The thermooptic type variable optical attenuator (100), using an optical material having a negative thermooptic effect, comprises a multi-mode optical propagation unit (3) provided between single-mode optical waveguides (1, 8) via tapers (2, 7), a heating thin-film heater (4) provided above the multi-mode optical propagation unit (3) so as to be inclined an angle beta to the optical propagation direction of a first optical waveguide (50), and a second optical waveguide (9) optically coupled with the side surface (3S1) of the multi-mode optical propagation unit (3) and inclined an angle 2beta to the optical propagation direction of the first optical waveguide (50). L'invention concerne un affaiblisseur optique variable de type thermo-optique pouvant être appliqué à un affaiblisseur optique variable de type réseau qui assure une faible diaphonie entre des réseaux de guides d'ondes adjacents. L'affaiblisseur optique variable de type thermo-optique (100), faisant appel à un matériau optique présentant un effet thermo-optique négatif, comprend une unité de propagation optique multimode (3) disposée entre des guides d'ondes optiques monomodes (1, 8) via des évasements (2, 7), un élément de chauffage de couche mince chauffante (4) disposé au-dessus de l'unité de propagation optique multimode (3) de manière à être incliné selon un angle beta par rapport à la direction de propagation optique d'un premier guide d'ondes optique (50), et un second guide d'ondes optique (9) couplé optiquement à la surface latérale (3S1) de l'unité de propagation optique multimode (3) et incliné selon un angle 2 beta par rapport à la direction de propagation optique du premier guide d'ondes optique (50).
Creation Date:
2005
Language:
English;French;Japanese
Source:
esp@cenet
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