Research on Phase Consistency of Optical Fiber Delay Module

The optical fiber delay module is mainly used in the optically controlled phased array radar system, which plays a core role in the whole system. Among them, the measurement accuracy of the optical fiber delay and the optical fiber length are key technologies to realize the phase consistency of the module. In this paper, the phase error source and phase consistency control method of optical fiber delay module are analyzed. Further, the high precision phase testing technology and reliability test of optical fiber delay module are carried out. It can be concluded that the combination of fiber fusion taper and optical phase shift can significantly improve the phase accuracy. Meanwhile, the phase consistency of each channel of the fiber delay module is very excellent before and after the test.