a very thin, flexible glass or plastic strand along which large quantities of information can be transmitted in the form of light pulses: used in telecommunications, medicine, and other fields.
optical fiber-based moisture sensors have been developed to help detect moisture problems in building envelopes.
The sensors are created with a coating on a long period grating that is written onto optical fiber.
optical fiber in Science
optical fiber A flexible transparent fiber of extremely pure glass or plastic, generally between 10 and 200 micrometers in diameter, used especially to carry light signals for telecommunication purposes. See more at fiber optics.