Question

Optical fiber sensors are electrically ____________

(a) active

(b) passive

(c) active as well as passive

(d) cannot be determined

I had been asked this question in an online interview.

Question is from Optical Fiber Sensors in division Physiological Transducers of Biomedical Instrumentation

Answer 1

The correct answer is:

(b) passive

Optical fiber sensors are typically considered passive because they do not require an external electrical power source to operate. They rely on the transmission and reflection of light through the fiber to detect changes in the environment, such as temperature, pressure, or strain. The optical fibers themselves are not electrically powered, making them passive devices.