Patent ID: 10386580

Abstract:
In an optical signal transmission system for transmitting signal light through a transmitting fiber, an optical connector, and a receiving fiber to an optical receptacle, the relationships ϕ1ex<ϕ2en and ϕpd<ϕ2en are satisfied, where ϕ1ex is the core diameter of the transmitting fiber at the exit face of the transmitting fiber, ϕ2en is the core diameter of the receiving fiber at the entrance face of the receiving fiber, and ϕpd is the diameter of a receiving surface of a light receiving element in the optical receptacle, and the relationship NA1ex>Na2en is satisfied, where, in the optical connector, NA1ex is the numerical aperture (NA) of the signal light emitted from the transmitting fiber, and NA2en is the NA of the signal light incident on the receiving fiber.