US 11,733,464 B2
Fiber structure, pulse laser device, and supercontinuum light source
Ryota Kakei, Hamamatsu (JP); Shin Kato, Hamamatsu (JP); Fumitsugu Fukuyo, Hamamatsu (JP); Tomoya Nakazawa, Hamamatsu (JP); Masaru Shimomaki, Hamamatsu (JP); Shinichi Ohba, Hamamatsu (JP); and Yu Matsushiro, Hamamatsu (JP)
Assigned to HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
Appl. No. 17/286,601
Filed by HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
PCT Filed Jul. 11, 2019, PCT No. PCT/JP2019/027598
§ 371(c)(1), (2) Date Apr. 19, 2021,
PCT Pub. No. WO2020/084844, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 2018-202248 (JP), filed on Oct. 26, 2018.
Prior Publication US 2021/0373246 A1, Dec. 2, 2021
Int. Cl. G02B 6/38 (2006.01); G02F 1/35 (2006.01); G02F 1/365 (2006.01)
CPC G02B 6/3803 (2013.01) [G02F 1/3528 (2021.01); G02F 1/365 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A fiber structure comprising:
first and second optical fibers disposed such that end portions thereof butt;
a first ferrule in which the first optical fiber is inserted;
a second ferrule in which the second optical fiber is inserted;
a sheet-shaped saturable absorber including a carbon nanotube disposed between the end portion of the first optical fiber and the end portion of the second optical fiber;
a housing internally accommodating the end portion of the first optical fiber and the end portion of the second optical fiber; and
a space defined by an inner surface of the housing, the end portion of the first optical fiber, an end portion of the first ferrule, the end portion of the second optical fiber, and an end portion of the second ferrule, wherein
the space includes a portion where the saturable absorber is disposed, and a cavity portion where the saturable absorber is not disposed, the cavity portion being formed by the end portion of the first ferrule and the end portion of the second ferrule being spaced from the inner surface of the housing, and
the space is airtight.