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Title:
LITHIUM NIOBATE WAVEGUIDE HAVING HIGH POLARIZATION EXTINCTION RATIO AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/061900
Kind Code:
A1
Abstract:
A lithium niobate waveguide having a high polarization extinction ratio and a manufacturing method thereof. The method provides a protective layer on a bottom surface of a lithium niobate substrate (3) before proton exchange processing begins, so as to prevent proton exchange on the bottom surface of the lithium niobate substrate, wherein the bottom surface is a surface on which a waveguide has not been etched. The method prevents proton exchange from occurring on the bottom surface of a lithium niobate substrate, thereby preventing TM mode leakage or TE mode leakage coupling into an output optical fiber and increasing the TE/TM polarization extinction ratio of the lithium niobate waveguide.

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Inventors:
DU CHUANG (CN)
WANG CHONG (CN)
DING LI (CN)
FU LI (CN)
CHEN XIAOMEI (CN)
Application Number:
PCT/CN2017/118362
Publication Date:
April 04, 2019
Filing Date:
December 25, 2017
Export Citation:
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Assignee:
ACCELINK TECH CO LTD (CN)
International Classes:
G02B6/134; G02B6/126
Foreign References:
CN105158849A2015-12-16
CN101118304A2008-02-06
JPH0756039A1995-03-03
CN107490824A2017-12-19
US5475772A1995-12-12
CN104597552A2015-05-06
CN101256253A2008-09-03
Attorney, Agent or Firm:
BEIJING TIAN QI ZHI XIN INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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