Question

In which of the following optic fiber sensor the fiber is simply used to carry light to and from an external optical device where the sensing takes place?

(a) extrinsic fiber optic sensor

(b) energized fiber optic sensor

(c) all fibers are used to simply carry light to and from the external optical devices

(d) intrinsic fiber optic sensor

I have been asked this question during a job interview.

The query is from Optical Fiber Sensors in section Physiological Transducers of Biomedical Instrumentation

Answer 1

Right option is (a) extrinsic fiber optic sensor

The best explanation: In an extrinsic fiber optic sensor fiber is simply used to carry light to and from an external optical device where the sensing takes place. In an intrinsic fiber optic sensor, one or more of the physical properties of the fiber undergo a change.