Two Output Modes of Fiber Optic Sensors

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Extrinsic fiber-optic sensors use an optical fiber cable, normally a multimode one, to transmit modulated light from either a non-fiber optical sensor, or an electronic sensor connected to an optical transmitter. An example is the measurement of temperature inside aircraft jet engines by using a fiber to trans.

CSM_FiberSensor_TG_E_2_1

These Sensors operate on the principle that an object interrupts or reflects light, so they are not limited like Proximity Sensors to detecting metal objects. This means they can be used to detect virtually

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CHAPTER 09 FIBER OPTIC SENSORS

Above fig. shows the vibration sensor that consists of two optical fibers held in close proximity to each other. When light is injected into one of the optical fiber, the light expand into a cone of light whose

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Optical Fiber Sensors Guide

The fiber sensor can be either an intrinsic one--if the modulation takes place directly in the fiber--or extrinsic, if the modulation is performed by some external transducer as depicted in Fig. 2.3.

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Microphone

A subtype of fiber-optic microphone uses a Fabry-Pérot interferometer as the sensing element. In these sensors, two partially reflective mirrors form an optical cavity

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Optical Fiber Sensors Guide

The schematic of a typical EFPI sensor configuration is shown in Figure 4.1 Light from a laser propagates along a lead-in single mode fiber to the Fabry-Perot cavity which is formed by the

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