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对相位敏感型低相干光干涉(OLCR)法延时测量系统进行了理论分析,建立了相关数学模型,搭建了基于非平衡迈克尔逊干涉仪的OLCR测量装置,以掺铒光纤放大器(EDFA)自发宽谱光作光源,对光子晶体光纤(PCF)延时(1540～1560nm)进行测量,取得0.14ps左右的测量精度。利用该系统测量光学元件参数,多采用元件末端面反射光与参考光干涉,但对光纤等器件的延时参数进行测量时,利用透射光会更加方便。
The phase-sensitive low coherence optical interferometry (OLCR) method is used to analyze the delay measurement system. The related mathematical model is established and the OLCR measurement device based on the unbalance Michelson interferometer is built. Wide-band light as a light source, the photonic crystal fiber (PCF) delay (1540 ~ 1560nm) were measured to obtain about 0.14ps measurement accuracy. Using the system to measure the parameters of the optical components, the reflected light of the end surface of the component is mostly used to interfere with the reference light. However, it is more convenient to use the transmitted light when measuring the delay parameter of the optical fiber and other devices.