Patent ID: 6201599
Filing Date: 2001-03-13
Classification: H04B

Abstract:
An optical transmission system, comprising:a plurality of optical transmission lines;a wavelength dependent optical divider having wavelength periodicity for demultiplexing a wavelength-division multiplexed light from an optical transmitting apparatus into a plurality of different signal wavelengths each being output onto a different one of the optical transmission lines;a plurality of optical receiving apparatuses each being connected to a different one of the optical transmission lines;a plurality of reflecting elements each being arranged on a different one of said optical transmission lines, each of the reflecting elements having a reflection bandwidth which does not include the signal wavelength output to its respective optical transmission line and includes at least one wavelength which can be output from the wavelength dependent optical divider to its respective optical transmission line;an optical pulse tester for outputting probe pulse light having at least one predetermined wavelength, and analyzing reflected light of said probe pulse light in a time domain; andan optical coupler for adding said probe pulse light from said optical pulse tester and said signal light from said optical transmitting apparatus, coupling such combined light to said wavelength dependent optical divider, and coupling the reflected light of said probe pulse light from said wavelength dependent optical divider to said optical pulse tester.