US 11,747,557 B2
Wavelength checker
Takuya Tanaka, Tokyo (JP); Hiroshi Ishikawa, Tokyo (JP); Kota Shikama, Tokyo (JP); and Atsushi Aratake, Tokyo (JP)
Assigned to Nippon Telegraph and Telephone Corporation, Tokyo (JP)
Appl. No. 17/633,532
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed Aug. 23, 2019, PCT No. PCT/JP2019/033063
§ 371(c)(1), (2) Date Feb. 7, 2022,
PCT Pub. No. WO2021/038630, PCT Pub. Date Mar. 4, 2021.
Prior Publication US 2022/0276435 A1, Sep. 1, 2022
Int. Cl. G02B 6/12 (2006.01); G01M 11/00 (2006.01); G01J 1/58 (2006.01); G01J 9/00 (2006.01); G02B 6/13 (2006.01)
CPC G02B 6/12019 (2013.01) [G01J 1/58 (2013.01); G01M 11/35 (2013.01); G02B 6/12016 (2013.01); G01J 9/00 (2013.01); G02B 6/13 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A wavelength checker comprising:
an optical waveguide chip; and
an optical converter comprising a conversion material configured to convert near-infrared light into visible light;
wherein the optical waveguide chip on a side connected to an optical fiber includes an arrayed waveguide grating and is mounted on a main substrate;
wherein a light emitting-side end surface of the optical waveguide chip on a side from which light is output to an external space is a reflection surface inclined to face the main substrate; and
the optical converter is provided at a location, on the optical waveguide chip, from which light reflected on the light emitting-side end surface is output to the external space.