A method for detecting a laser system and method for self-interference characteristics

A detection system of the present invention discloses a laser self-coherence property, comprising a first coupler, a mirror, a first tunable optical delay, a second tunable optical delay, a second coupler, the receiver and signal analysis the interference electric signal detecting means by a first adjustable delay and second adjustable optical delay fiber delay adjustment, the receiver analyzes the received signal detection means output electrical signal according to the interference of the interference analysis of the results obtained from the maximum coherence length of the laser. The present invention discloses a method of detecting the respective laser self-coherence property. Embodiment of the present invention, can be easily detected from the coherent laser characteristics, and precision and accuracy are very high.