US 11,852,866 B2
Waveguide member and waveguide layered product
Toshiki Iwai, Kawasaki (JP); and Taiji Sakai, Kawasaki (JP)
Assigned to FICT LIMITED, Nagano (JP)
Appl. No. 17/424,284
Filed by FUJITSU INTERCONNECT TECHNOLOGIES LIMITED, Nagano (JP)
PCT Filed May 1, 2020, PCT No. PCT/JP2020/018384
§ 371(c)(1), (2) Date Jul. 20, 2021,
PCT Pub. No. WO2020/235333, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 2019-096845 (JP), filed on May 23, 2019.
Prior Publication US 2022/0066098 A1, Mar. 3, 2022
Int. Cl. G02B 6/122 (2006.01)
CPC G02B 6/1221 (2013.01) 3 Claims
OG exemplary drawing
 
1. A waveguide member comprising:
a plurality of cores each configured to allow light to be transmitted therethrough;
a clad surrounding the plurality of cores and smaller in refractive index for light than each of the cores; and
a transmission suppression member located between mutually adjacent two cores out of the plurality of cores in the clad without contact with the cores and configured to suppress transmission of light leaking from each of the cores,
wherein the clad includes a resin-made portion and a glass-made portion higher in bending stiffness than the resin-made portion,
wherein the transmission suppression member is in a form of a film or plate and is provided at a boundary between at least a side surface of the glass-made portion facing one of the adjacent two cores and the resin-made portion, and
wherein the glass-made portion is configured to support the transmission suppression member and to maintain an overall shape of the clad.