FIXING STRUCTURE OF WAVEGUIDE TYPE ELEMENT

• Main Authors: SUGAMATA TORU, HASHIMOTO YOSHIHIRO, MIYAMA YASUYUKI, KIUCHI KAZUMASA
• Format: Patent
• Language: English
• Published: 21.03.2000
• Edition: 7
• 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 ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To enable a waveguide type element to obtain a stable high frequency characteristic without being affected by the strength of electrical connection with a casing due to the width of a ground electrode. SOLUTION: A notched part 12 is formed in a casing 11 and a modulation electrode and a optical waveguide 2 composed of a signal electrode 3 and the ground electrode 4 are formed in the part of the notched part 12. Here, a substrate 1 is installed and fixed on the casing 11 so that the area where a high frequency electric signal applied on a waveguide type element from the modulation electrode and a light wave guided in the optical waveguide 2 substantially interact each other, is positioned, that is, so that the area of the substantial interaction is not brought in contact with the casing 11.