OPTICAL ELEMENT, OPTICAL INTEGRATED ELEMENT, AND METHOD FOR MANUFACTURING OPTICAL INTEGRATED ELEMENT

Title:

OPTICAL ELEMENT, OPTICAL INTEGRATED ELEMENT, AND METHOD FOR MANUFACTURING OPTICAL INTEGRATED ELEMENT

Document Type and Number:

WIPO Patent Application WO/2023/079720

Kind Code:

A1

Abstract:

This optical element (11) is connected to a pair of optical waveguide elements through a pair of third waveguide cores, the optical element comprising a pair of first waveguide cores (111_1, 111_2), a pair of second waveguide cores, and a connection waveguide (115), wherein: the refractive index of the first waveguide cores is greater than the refractive index of the second waveguide cores; at least a modal field changing unit of each of the first waveguide cores is covered by the second waveguide cores; the connection waveguide is connected to a pair of second waveguides through optical multiplexing/demultiplexing units (114_1, 114_2); and one of the second waveguide cores (112_1) is connected to one optical waveguide element (12_1) through one third waveguide core (131_1), and the other of the second waveguide cores (112_2) is connected to the other optical waveguide element (12_2) through the other third waveguide core (131_2).　As a result, this optical element can reduce manufacturing costs and increase the number of signal optical fibers for connection.

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Inventors:

SAITO YOHEI (JP)
SHIKAMA KOTA (JP)
SATO NORIO (JP)

Application Number:

PCT/JP2021/040913

Publication Date:

May 11, 2023

Filing Date:

November 08, 2021

Export Citation:

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Assignee:

NIPPON TELEGRAPH & TELEPHONE (JP)

International Classes:

G02B6/122; G02B6/125; G02B6/13

Domestic Patent References:

WO2021161371A1

2021-08-19

Foreign References:

JP2007206149A	2007-08-16
JPH08320422A	1996-12-03
JP2008107750A	2008-05-08
JP2010008787A	2010-01-14
US20160062039A1	2016-03-03

Other References:

SAITO YOHEI; SHIKAMA KOTA; TSUCHIZAWA TAI; NISHI HIDETAKA; ARATAKE ATSUSHI; SATO NORIO: "Tapered Self-Written Waveguide between Silicon Photonics Chip and Standard Single-Mode Fiber", 2020 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC), OSA, 8 March 2020 (2020-03-08), pages 1 - 3, XP033767590, DOI: 10.1364/OFC.2020.W1A.2

Attorney, Agent or Firm:

YAMAKAWA, Shigeki et al. (JP)

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