Patent ID: 7869014

Claim:
A measurement system for wavelength-dispersion distribution and nonlinear co-efficient comprising: a pump light source for generating pump light; a probe light source for generating probe light; a phase modulator structured to phase modulate the pump light; a power modulator for pulsing said pump light and/or said probe light; a first coupler for coupling said pulsed pump light and said pulsed probe light together and inputting them to an optical fiber to be measured; light-receiving means for wavelength-selecting either back-scattered light of said pulsed probe light occurring within said optical fiber or back-scattered light of pulsed idler light occurring within said optical fiber, after said pulsed pump light and said pulsed probe light are input to said optical fiber, receiving a trigger signal synchronized with an electric signal required for pulsing said pump light and/or said probe light, and outputting an electric signal representing a waveform of said selected scattered light; a first calculation means for calculating wavelength-dispersion distribution and nonlinear-coefficient distribution in a longitudinal direction of said optical fiber from a waveform of said electric signal; and a power measuring unit, disposed on a pulse exit end of said optical fiber, for measuring power of idler light from the pulse exit end of said optical fiber.