Optical Power Ring Model for Coupling Efficiency Estimation in VCSEL-MMF Links

An optical power ring model for calculating fiber coupling efficiency is proposed. This model can reflect the complex mode field distribution at the end face of a launch fiber. Experimental results show that the model has higher accuracy than the model based on the uniform and Gaussian distribution. In addition, a further simulation analysis using the new model has proven that the large core multimode fiber has higher tolerance to the radial coupling offset and dust contamination.