摘要
Rayleigh-back scattering induced coherence collapse of an asymmetric distributed feedback fiber laser （DFB FL） sensor is investigated using a composite cavity model. The coherence collapse threshold condition of the asymmetric DFB FL sensor is measured. The DFB FL sensor shows different dynamic behaviors in different pump configurations. According to the asymmetric behavior to the external optical feedback, a novel method to find the actual phase shift position of the asymmetric DFB FL sensor is presented.
Rayleigh-back scattering induced coherence collapse of an asymmetric distributed feedback fiber laser （DFB FL） sensor is investigated using a composite cavity model. The coherence collapse threshold condition of the asymmetric DFB FL sensor is measured. The DFB FL sensor shows different dynamic behaviors in different pump configurations. According to the asymmetric behavior to the external optical feedback, a novel method to find the actual phase shift position of the asymmetric DFB FL sensor is presented.
基金
This work was supported by the National Science Foundation of China （NSFC 11304388）.
