Abstract

Intensity sensors based on multimode fibers, incoherent light sources, and simple detector circuits are preferred in applications where simplicity and robustness are of the paramount importance. Existing multimode fiber sensors often require the use of external structures to induce perturbations on the fibers.^1,2 Many problems, hysteresis and drift for example, are traced directly to the external structures. If corrugation structures are built onto and become integral parts of the fibers, no external structure is needed and the aforementioned problems can be greatly reduced, if not eliminated.

© 1991 Optical Society of America