摘要
A length-matched micro Fabry-Perot(FP)interferometer is proposed for strain measurement under irradiation environment.Theoretical simulation shows that a well length-matched FP sensor can achieve a very low drift of the cavity length and strain sensitivity in irradiation environment.In experiment,such an FP cavity is realized by laser micromachining.It shows a low cavity length drift of−0.037μm and a strain sensitivity deviation of 0.52%,respectively,under gamma irradiation.Meanwhile,the intensity of interference fringes is also stable.As a result,such a length-matched FP cavity is a very promising candidate for strain sensing in radiative environments.
基金
This work was funded by the National Natural Science Foundation of China(Grant No.51875091)
the Study and Application of Full-Model Impact Dynamic Fretting Damage Test System in the Extreme Environment(Grant No.51627806)
Optical Fiber Sensing and Processing Prototype for Nuclear Field Key Parameter Measurement(Grant No.191091)
Data Acquisition and Post-Processing Software Development for Integrated Fiber Optic Sensors(Grant No.190167)
the State 111 Project(Grant No.B14039).
