US 12,306,445 B2
Optical connector and optical connector connection structure
Kengo Watanabe, Tokyo (JP); Mitsuhiro Iwaya, Tokyo (JP); Masayoshi Tsukamoto, Tokyo (JP); and Katsuki Suematsu, Tokyo (JP)
Assigned to FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
Filed by FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
Filed on Sep. 15, 2022, as Appl. No. 17/932,573.
Application 17/932,573 is a continuation of application No. PCT/JP2021/012815, filed on Mar. 26, 2021.
Claims priority of application No. 2020-065048 (JP), filed on Mar. 31, 2020.
Prior Publication US 2023/0011146 A1, Jan. 12, 2023
Int. Cl. G02B 6/38 (2006.01)
CPC G02B 6/3853 (2013.01) 10 Claims
OG exemplary drawing
 
1. An optical connector comprising:
at least one optical fiber;
a lens element including at least one lens that couples light to an end face of the optical fiber;
a ferrule holding the optical fiber; and
an adhesive filled between the ferrule and the lens element, wherein
a distance FLh (μm) between an end face of the optical fiber and a vertex of the lens is expressed by a sum of a distance FL (μm) from the vertex of the lens to a focal point F positioned in a back face direction of the lens and a length δ (μm) between the end face of the optical fiber and the focal point F,
the length δ is longer than 10 μm,
the back face of the lens is fixed to the end face of the optical fiber via an adhesive,
a connection loss during high power light input is smaller than a connection loss during low power light input,
the high power is an incoming optical power of +20 dBm or more,
the low power is an incoming optical power less than +11 dBm,
the optical fiber is a single-mode fiber.