Modeling and optimal design of fiber-optic probe for medium detection based on computer simulation

This paper conducted a deep study on the technique of fiber-optic probe (FOP). Firstly, the feasibility of FOP medium detection was analyzed by establishing a mathematic model. Secondly, in order to improve the sensitivity of FOP, the material, shape and angle of conic sensitive tip of FOP were optimally designed by analyzing simulation experiments. Besides for improving light transmitting efficiency of FOP, based on simulation experiments, the optimum structure was concluded by evaluating the performances of eight structures of the bundle coupling light path. Lastly, a sapphire-FOP was developed on the foundation of above optimizations, the sapphire-FOP has high sensitivity and compact size, meanwhile, the output response experiment of the sapphire-FOP in different media, the response characteristics experiments of the sapphire-FOP piercing a gas bubble, and the response characteristics experiments of detection multiple gas bubbles in water medium were carried out to identify the performance of the sapphire-FOP in gas resolution, anti-contamination and response sensitivity.