Patent ID: 9069118
Filing Date: 2015-06-30
Classification: G02B

Abstract:
1. An optical fan-in/fan-out device comprising: a plurality of relay fibers; and an outer circumference clad which is integrated with each of the plurality of relay fibers to fill a space between the relay fibers and to surround a circumference surface of each relay fiber, wherein the relay fiber includes: a first core; a second core which has a refractive index lower than a refractive index of the first core and surrounds a circumference surface of the first core without clearance; and a clad which has a refractive index lower than a refractive index of the second core and surrounds a circumference surface of the second core without clearance, the outer circumference clad has a tapered portion by which the plurality of relay fibers is shrunk in diameter from one end side toward the other end side, and in a case where a radius of the first core in a large-diameter end surface of the tapered portion is denoted by r