Optical frequency domain reflection method and system based on frequency synthesis

摘要

An optical pulse is acquired by electro-optic modulation (3) and acousto-optic modulation (4) of local light, and this is input to the measurement optical fiber (9) as a detection pulse optical signal (15). An optical frequency domain reflection method and system based on frequency synthesis that realizes an optical frequency reflectometer by performing photoelectric conversion and demodulation after coherent detection of an optical signal (16) with local light, comprising: 3) modulation using a single frequency signal (11), acousto-optic modulation (4) using a pulse signal (12), and a plurality of optical comb signals obtained by electro-optic modulation (3) It is an optical frequency domain reflection method and system based on frequency synthesis, in which an optical pulse is acquired by simultaneously sweeping frequency components. The optical frequency domain reflection method and system have a large detection distance, a high spatial resolution, and a low hardware cost and software complexity. [Selection] Figure 1