The Optical Measurement Of Microstructure Optical Fiber's Cross-section Parameters

In recent years, the microstructure optical fiber (MOF) obtained a fast development. Meanwhile, along with the unceasing renovation of MOF's design, the measurement of MOF, which is one of hot research areas in the last few years, turns into a challenge, such as the non-contact optical measurement to MOF devices.The main content of this paper include two parts as follows. The system for measuring MOF's cross-section parameters is designed and set up in the first step. Then a series of optical experiments for measuring the cross-section parameters of MOFs were carried out based on the system eventually.The background, characters, structures and mechanism of MOFs were introduced at first. And then the theory and method of non-contact optical measurement were analyzed. Through the analysis of microstructure testing methods in engineering and manufacturing, related principle and theoretical basis about measuring MOF's cross-section parameters were amply described. According actual demand, we designed experimental system, processed relevant device actually from the principle of measuring system.Based on the theoretical analysis, a series of optical measuring experiments had been done using the originally designed MOF measuring system. The axis-locating method, the fringe-spliced method, and the correlation-operation axis-determining method were proposed to establish a MOF parameter-referential database. The COMSOL Multiphysics simulation was introduced to compare the theoretical and experimental results.The experimental results indicated that optical measuring method of MOF's cross-section parameters is of high sensitivity and flexible implement conditions. The experimental system, which has low-cost and be adjusted simply, will certainly develop rapidly in the future.