OPTICAL WAVEGUIDE ELEMENT, AND OPTICAL MODULATION DEVICE AND OPTICAL TRANSMISSION DEVICE USING THE SAME

An optical waveguide element (OE) includes a substrate (1) having an electro-optic effect, an optical waveguide (2) formed in the substrate, and a control electrode arranged on the substrate (1) to modulate a light wave propagating through the optical waveguide. The control electrode includes a sign...

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Bibliographische Detailangaben
Hauptverfasser:	MOTOYA, Masayuki, KATAOKA, Toshio
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 LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	An optical waveguide element (OE) includes a substrate (1) having an electro-optic effect, an optical waveguide (2) formed in the substrate, and a control electrode arranged on the substrate (1) to modulate a light wave propagating through the optical waveguide. The control electrode includes a signal electrode (S) and a ground electrode. The signal electrode (S) and the ground electrode are arranged along a modulation effect portion of the optical waveguide that performs modulation. In a shape of a bottom surface of the ground electrode facing the substrate, a slit (SL) separating the ground electrode into a first ground electrode (G1) close to the signal electrode (S) and a second ground electrode (G2) far from the signal electrode (S) is formed in a range corresponding to the modulation effect portion.