Title:
OPTICAL WAVEGUIDE ELEMENT AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2024/100865
Kind Code:
A1
Abstract:
This optical waveguide element comprises: a first substrate (10); and a plurality of optical waveguides (40) which are formed on the substrate (10) and which comprises a non-linear optical material. The plurality of optical waveguides (40) include: a core (2a) of one main optical waveguide; and a core (2b) of at least one sub optical waveguide adjacent along the main optical waveguide. The core (2a) of the main optical waveguide has one or a plurality of regions arranged in a light propagation direction, and each of the one or plurality of regions in the core (2a) of the main optical waveguide has a periodic polarization inversion structure having a desired pitch. The core (2b) of the sub optical waveguide has a plurality of regions arranged in the light propagation direction. The plurality of regions in the core of the sub optical waveguide have periodic polarization inversion structures of mutually different pitches. The core (2a) of the main optical waveguide is trimmed on the basis of the optical characteristics of the sub optical waveguide, thereby making the effective refractive index with respect to the light propagation direction uniform.
Inventors:
INOUE ASUKA (JP)
UMEKI TAKESHI (JP)
UMEKI TAKESHI (JP)
Application Number:
PCT/JP2022/042011
Publication Date:
May 16, 2024
Filing Date:
November 10, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G02F1/377; G02B6/13
Domestic Patent References:
| WO2008050802A1 | 2008-05-02 | |||
| WO2003058337A1 | 2003-07-17 |
Foreign References:
| JP2004219751A | 2004-08-05 | |||
| JP2014211539A | 2014-11-13 | |||
| CN113078536A | 2021-07-06 |
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
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