With the development of the optical communication technology

the non-linear effect of optical fiber has become one of the main factors that restrict the performance of the optical communication system. Demands of fiber non-linear coefficient measurement is also increasing. In this paper

a non-linear fiber automatic measurement system is designed. This system controls multiple apparatuses and makes them work together

the relevant data are collected and the non-linear coefficient of the fiber sample is calculated automatically. The system is easy to be implemented and operated

and the measurement result is of good repeatability. So

the system has certain practical significance.