全光纤多模速度干涉仪的研究

针对传统全光纤单模速度干涉仪在爆炸冲击试验中,前端的单模准直器对高速运动的物体的漫反射光难以有效收集,提出了全光纤多模速度干涉仪的装置。利用超辐射发光二极管作为光源,初步验证了全光纤多模速度干涉仪的可行性。主要阐述了全光纤多模速度干涉仪的原理和结构,并将其与全光纤单模速度干涉仪在喇叭振动速度的实验中进行比较,取得了一致的结果,最后还进行霍普金森压杆撞击实验,实测的速度最大值为10.49 m/s,与理论值10 m/s符合较好。

Research of All-Fiber Multimode Velocity Interferometer

All-fiber multi-mode velocity interferometer is put forward to make up the shortcoming that the collimator of the conventional all-fiber single-mode velocity interferometer cannot collect diffuse reflection of the high-speed object effectively in the explosion experiment.The validity of the all-fiber multimode velocity interferometer is proved by using the super luminescent laser diode.The principle and the structure of the all-fiber multimode velocity interferometer are described.Experimental comparsion of all-fiber multimode velocity interferometer and the conventional all-fiber single-mode velocity interferometer in the vibrant velocity measurement for the speaker shows the consistent result.In the Hopkinson bar striking experiment,the measured maximum velocity 10.49 m/s is in accord with the theoretical value 10 m/s.