Patent ID: 6775005
Filing Date: 2004-08-10
Classification: G01M

Abstract:
A low-coherence reflectometer comprising:a light source; a first splitter for splitting a light beam from the light source into a first split beam and second split beam; a second splitter for inputting the first split beam from the first splitter into an optical circuit to be measured, the second splitter for splitting the first split beam reflected on the optical circuit into a third split beam and fourth split beam; a polarization controller for controlling polarization of the third split light received from the second splitter; a third splitter for allowing the second split beam from the first splitter to be incident on a reflector, the third splitter for splitting the second split beam reflected on the reflector into a fifth and sixth split beam; and a coupling unit for combining the third split beam controlled by the polarization controller with the fifth split beam output from the third splitter.