Fig. 6 shows the basic configuration of the proposed dual-optical-
fiber-sensor system incorporating the FBG and FP sensors
described in Sections II and III, respectively. The system comprises
a broadband light source, an optical spectrum analyzer, a
fiber coupler, and the two sensors. As shown, the FBG and FP
sensors are separated by a known vertical distance of . From
(1) to (3), the Braggwavelength shift and change in cavity length
can be rewritten as
Fig. 6 shows the basic configuration of the proposed dual-optical-fiber-sensor system incorporating the FBG and FP sensorsdescribed in Sections II and III, respectively. The system comprisesa broadband light source, an optical spectrum analyzer, afiber coupler, and the two sensors. As shown, the FBG and FPsensors are separated by a known vertical distance of . From(1) to (3), the Braggwavelength shift and change in cavity lengthcan be rewritten as
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