Fig. 6From: Fiber optic sensing technologies potentially applicable for hypersonic wind tunnel harsh environmentsFabrication flow of FPI fiber optic sensors based on laser micro-processing. a A micro hole is made on the readily-cut fiber end by using the pulsed laser, b and c The holed fiber is connected to another section of readily-cut fiber by fusion splicing, and at last (d), FP interference cavity is created [56]Back to article page