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. 2021 Apr 4;14(7):1780. doi: 10.3390/ma14071780

Figure 1.

Figure 1

(a) Schematic of the FP-cavity of the sensor. The interference signal is generated by reflected beams at the fiber end (I1) and the diamond membrane (I2). (b) A sketch of the sensing element structure. A thin diamond membrane on silicon is aligned to a single mode fiber to realize a low-finesse FP cavity. The cavity length is equal to the silicon substrate’s thickness.