WAVELENGTH CONVERSION ELEMENT AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2020/100937

A1

In a wavelength conversion element using the nonlinear optical effect, an unintended slab waveguide can be incidentally formed when preparing an array waveguide including a target nonlinear waveguide. Slab waveguides induce erroneous measurements when selecting a waveguide with desirable characteristics from an array waveguide. The erroneous measurements require the process of manufacturing a wavelength conversion element to be repeated, which reduces yield and hinders the evaluation of waveguide properties when selecting a waveguide and the subsequent efficient preparation of the wavelength conversion element. The wavelength conversion element according to the present invention is provided with a plurality of waveguides prepared on a substrate with a plurality of slab waveguides provided away from and roughly parallel to each of the plurality of waveguides; each slab waveguide has a grating structure for reflecting light of a specific wavelength. The grating structure serves to efficiently select a waveguide with desirable optical characteristics from among the plurality of waveguides.

KAZAMA TAKUSHI (JP)
KASHIWAZAKI TAKAHIRO (JP)
TADANAGA OSAMU (JP)
EMBUTSU KOJI (JP)
KASAHARA RYOICHI (JP)
UMEKI TAKESHI (JP)

PCT/JP2019/044514

May 22, 2020

November 13, 2019

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NIPPON TELEGRAPH & TELEPHONE (JP)

G02F1/377; G02B6/12; G02B6/124; G02B6/13; G02B6/136; G02F1/39; H04B10/00

JP2014211539A	2014-11-13
JP2011043657A	2011-03-03
JP2001133647A	2001-05-18
JP2017044781A	2017-03-02
US5185752A	1993-02-09

TANI & ABE, P.C. (JP)

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