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Optics Letters

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  • Vol. 21, Iss. 5 — Mar. 1, 1996
  • pp: 333–335

Measurement of the refractive-index modulation generated by electrostriction-induced acoustic waves in optical fibers

Paul D. Townsend, Alistair J. Poustie, P. J. Hardman, and K. J. Blow  »View Author Affiliations


Optics Letters, Vol. 21, Issue 5, pp. 333-335 (1996)
http://dx.doi.org/10.1364/OL.21.000333


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Abstract

The refractive-index modulation generated in optical fibers by electrostriction-induced acoustic waves is investigated directly by a pump-probe measurement technique in a 1-km-long fiber Sagnac-loop interferometer. Pump pulses propagating unidirectionally around the loop generate transverse acoustic waves that produce a time-dependent relative phase shift for the probe pulses. The consequent interferometer transmission changes are used as a measure of the acoustic interaction. The acoustic impulse response function of the fiber is measured by use of short optical pulses with a 1-MHz repetition rate. The response consists of a series of peaks separated by ~21 ns with a maximum value of refractive-index modulation of −1.1 × 10−11 generated by the 230-pJ pump pulses. At a higher pulse repetition rate of 100 MHz additional temporal structure is generated in the 0–5-ns period after the pump pulse, leading to a response similar to that observed in long-range soliton interaction.

© 1996 Optical Society of America

History
Original Manuscript: September 11, 1995
Published: March 1, 1996

Citation
Paul D. Townsend, Alistair J. Poustie, P. J. Hardman, and K. J. Blow, "Measurement of the refractive-index modulation generated by electrostriction-induced acoustic waves in optical fibers," Opt. Lett. 21, 333-335 (1996)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-21-5-333


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