OPTICAL WAVEGUIDE, OPTICAL COMPONENT AND OPTICAL SWITCH

OPTICAL WAVEGUIDE, OPTICAL COMPONENT AND OPTICAL SWITCH

PROBLEM TO BE SOLVED: To increase the latitude of the shape of an optical waveguide while suppressing optical propagation loss at the curved part and branching part of the optical waveguide. SOLUTION: By forming a lower clad layer 11a on a substrate 10, providing a Y-branched optical waveguide 9 on...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TERAKAWA YUKARI, HOSOKAWA HAYAMI
Format: Patent
Sprache:eng
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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Zusammenfassung:PROBLEM TO BE SOLVED: To increase the latitude of the shape of an optical waveguide while suppressing optical propagation loss at the curved part and branching part of the optical waveguide. SOLUTION: By forming a lower clad layer 11a on a substrate 10, providing a Y-branched optical waveguide 9 on the lower clad layer 11a and covering the optical waveguide 9 with an upper clad layer 11b, an optical element 8 is produced. The curved part of the optical waveguide 9 is tapered on the outer peripheral side and is formed to be trapezoidal on the cross section and the effective refractive index of the optical waveguide 9 is reduced on the tapered outer peripheral side. To the contrary, the end face of the optical waveguide 9 is formed to be rectangular and coupling efficiency with an optical fiber is improved. COPYRIGHT: (C)2003,JPO