Time-division multiplexing exploiting low-coherence interferometry with a multimode laser diode source

Jose Luis Santos; David A. Jackson

doi:10.1117/12.56518

1 January 1992 Time-division multiplexing exploiting low-coherence interferometry with a multimode laser diode source

Jose Luis Santos, David A. Jackson

Proceedings Volume 1586, Distributed and Multiplexed Fiber Optic Sensors; (1992) https://doi.org/10.1117/12.56518
Event: OE Fiber, 1991, Boston, MA, United States

Abstract

A reflective array of optical fiber sensors multiplexed in time and with their status read using coherence sensing associated with directly modulated multimode laser diode illumination is investigated. Sensor sensitivity as determined by primary noise sources is evaluated and numeric results are presented. The concept is demonstrated with two all fiber Michelson interferometers and applied to the measurement of periodic and quasi-static parameters. It is shown that the effect of feedback light into the laser cavity on the level of the system noise floor is negligible, making unnecessary the use of source optical isolation.

Citation Download Citation

Jose Luis Santos and David A. Jackson "Time-division multiplexing exploiting low-coherence interferometry with a multimode laser diode source", Proc. SPIE 1586, Distributed and Multiplexed Fiber Optic Sensors, (1 January 1992); https://doi.org/10.1117/12.56518

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