A series of experiments in which a multimode optical fiber was forced to vibrate by a loudspeaker was performed to investigate the sensing mechanism of an integrated optical-fiber communication–sensing system. It was demonstrated that the sensing mechanism is predominantly pressure-induced phase modulation rather than mode-coupling-induced power transfer in an optical fiber.
© 1990 Optical Society of America
Original Manuscript: August 7, 1989
Manuscript Accepted: February 28, 1990
Published: May 15, 1990
Kuang-yi Chen, Chung-yee Leung, and I-fan Chang, "Experimental demonstration of a sensing mechanism for optical-fiber intermodal interference sensors," Opt. Lett. 15, 582-584 (1990)