FIBER OPTIC ISOLATOR FOR USE WITH MULTIPLE-WAVELENGTH OPTICAL SIGNALS

摘要

A fiber optic isolator device is used by fiber optic systems operating at more than one wavelength. The device may be inserted anywhere within the fiber network. The fiber optic device permits the separation of the wavelengths so that an optical isolator module can isolate a first wavelength without significantly affecting the second wavelength. This device is useful isolating a communications signal at 1.55 mu m while avoiding significant losses for an optical time domain reflectometry signal, for example at 1.3 mu m.