Self-Mixing Fiber Ring Laser Velocimeter With Orthogonal-Beam Incident System

In this paper, we present a method of velocity measurement using of a novel self-mixing velocimeter with orthogonal-beam incident system (OSMV), which enables the velocity measurement without knowing the incident angle information. The fiber ring laser used could provide a stable and narrow-width laser light source, which could enhance the stability and the signal-to-noise ratio of the novel self-mixing fiber ring laser velocimeter. The result indicates a much better linearity of our novel velocimeter than the traditional one in the turntable experiment due to the use of the orthogonal-beam incident system and fiber ring laser source. The relative error rates of our novel velocimeter system are up to 1.258% in contrast with the 13.720% result of the traditional one.