US Patent 7916983 Signal identifying apparatus for an optical fiber

Provided is a signal identifying apparatus for an optical fiber that includes a detecting portion capable of detecting a signal originating from a first end of the optical fiber and a signal originating from a second end of the optical fiber. Additionally, the signal identifying apparatus includes an identifying portion that identifies a desired signal by separating the signal originating from the first end of the optical fiber from the signal originating from the second end of the optical fiber.