A DEVICE AND A METHOD FOR DISTINGUISHING FAULTS EMPLOYED IN AN OPTICAL TRANSMISSION SYSTEM

摘要

The present invention discloses a fault distinguishing device (11) for establishing whether fault exists in an optical fiber cable (2) and in another optical system (3). The disclosed device (11) is intermediate between the optical fiber cable (2) and the another optical system (3) and optically coupled with the optical fiber cable (2) and the another optical system (3). The disclosed device is composed of at least one intrinsic optical fiber and at least one optical filter (14). The optical filter (14) is internal to a corresponding intrinsic optical fiber (17), and forms an angle of between 0 and 4.7 degrees inclusive with respect to a plane perpendicular to the longitudinal axis of the intrinsic optical fiber (17), such that the optical fiber (17) is capable of reflecting a first light component ( lambda t) and of transmitting a second light component ( lambda o). The first light component ( lambda t) and the second light component ( lambda o) differ from one another in terms of wavelength.