Patent ID: 7020360
Filing Date: 2006-03-28
Classification: G01M

Abstract:
1. A wavelength dispersion probing system, comprising: an incident mechanism of entering pulsed light, in which an intensity ratio of two wavelength components having a predetermined gap is adjustably set, into one end of a fiber under test; an intensity ratio setting unit of setting the intensity ratio of the two wavelength components to the incident mechanism; a detection unit of detecting at least one of Stokes light or anti-Stokes light out of return light emitted from one end of the fiber under test, and generating an electric detection signal; a frequency calculating unit of calculating a frequency of the detection signal; a wavelength dispersion calculating unit of calculating wavelength dispersion of the fiber under test on the basis of a frequency calculated by the frequency calculating unit; and a sign judging unit of judging a sign for wavelength dispersion on the basis of multiple calculation results of wavelength dispersion by the frequency calculating unit performed before and after modifying the intensity ratio of two wavelength components by the intensity ratio setting unit.