The principle of time delay measurement system using phase-sensitive optical low-coherence reflectometry(OLCR) is analyzed and the mathematic model is given.The measurement system based on non equilibrium Michelson interferometer is established,using ASE broadband light of EDFA as the source,and the time delay of photonic crystal fiber from 1540 nm to 1560 nm is measured with accuracy about 0.14 ps.In OLCR system,the reflected light from the end face of optical device is commonly used for interference with ...