AN OPTICAL DEMULTIPLEXER

摘要

An apparatus for demultiplexing a wavelength division multiplexed optical signal includes a plurality of wavelength channels each having a different signal wavelength. The apparatus includes a signal port (1) and a plurality of grating modules (2). Each grating module has a coupler (3) and a fiber Bragg grating (4) which has a unique wavelength. The grating modules each have an input port (5), an optical tap (6), and an output port (7). The grating modules are configured in a row (8) having a first end (9) and a second end (10). This is accomplished by connecting the output port of each grating module to the input port of another grating module. The first end of the row of grating modules is connected to the signal port. The Bragg gratings refle ct different signal wavelengths.