Fig. 1. Structural diagram of DFB fiber laser accelerometer sensor. (a) Overall structure; (b) dimension of mass block; (c) dimension of base

Fig. 2. Axial strain versus bottom radius of mass block

Fig. 3. First-order intrinsic frequency versus bottom radius of mass block

Fig. 4. Axial strain versus top radius of mass block

Fig. 5. First-order intrinsic frequency versus top radius of mass block

Fig. 6. Axial strain versus height of mass block

Fig. 7. First-order intrinsic frequency versus height of mass block

Fig. 8. ANSYS mode analysis result of accelerometer sensors

Fig. 9. Displacement of center point on end face of mass block at different frequencies

Fig. 10. Prototype sample of DFB fiber laser accelerometer sensor

Fig. 11. Schematic of acceleration sensitivity testing system

Fig. 12. Experimental frequency response curves of DFB fiber laser accelerometer