JPH0278931U

JPH0278931U -

Info

Publication number: JPH0278931U
Application number: JP15840988U
Authority: JP
Priority date: 1988-12-05
Filing date: 1988-12-05
Publication date: 1990-06-18

Description

[Brief explanation of the drawing]

第１図Ａ及びＢはこの考案の第一実施例の説明
に供する正面図及び平面図、第２図は高耐圧絶縁
物質の配設の説明に供する要部正面図、第３図Ａ
及びＢはこの考案の第二実施例の説明に供する正
面図及び平面図、第４図は第三実施例の説明に供
する正面図、第５図Ａ〜Ｆは電極の配設方法の一
例の説明に供する図、第６図Ａ〜Ｆは電極の配設
方法の他の例の説明に供する図、第７図Ａ及びＢ
はこの考案の第四実施例の説明に供する正面図及
び平面図、第８図Ａ及びＢは従来の導波型光素子
例えば光変調器の構造を概略的に示す正面図であ
る。２０，３１，３２，４２…導波型光素子、２２
，４４，４６…光導波路、２４…電極、２４ａ，
２４ｂ…電極部材、２６…高耐圧絶縁物質。 1A and 1B are a front view and a plan view for explaining the first embodiment of this invention, FIG. 2 is a front view of main parts for explaining the arrangement of high voltage insulating material, and FIG. 3A
and B are a front view and a plan view for explaining the second embodiment of this invention, FIG. 4 is a front view for explaining the third embodiment, and FIGS. 5 A to F are an example of an electrode arrangement method. Figures for explanation; Figures 6A to F are diagrams for explanation of other examples of electrode arrangement methods; Figures 7A and B;
8A and 8B are front views schematically showing the structure of a conventional waveguide type optical element, such as an optical modulator. 20, 31, 32, 42... Waveguide type optical element, 22
, 44, 46... optical waveguide, 24... electrode, 24a,
24b...electrode member, 26...high voltage insulating material.

Claims

[Claims for Utility Model Registration] (1) An optical waveguide whose refractive index is electrically controlled;
The waveguide type optical device comprising the electrode for controlling the refractive index has a dielectric strength voltage that does not cause dielectric breakdown due to the high electric field when air is formed with a high electric field that starts dielectric breakdown. 1. A waveguide type optical device characterized in that a high voltage insulating material having a high withstand voltage is provided at least at a position around an electrode where the high electric field is formed. (2) Claim 1 characterized in that the dielectric strength voltage of the high voltage insulating material is higher than the dielectric strength voltage of dry air.
The waveguide type optical device described in . (3) Claims 1 to 3, wherein the electrode is constituted by a plurality of electrode members, and the high voltage insulating material is provided at least between adjacent electrode members.
2. The waveguide optical device according to 2.