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Optics Letters

Optics Letters


  • Vol. 13, Iss. 2 — Feb. 1, 1988
  • pp: 152–154

Frequency-modulated to amplitude-modulated signal conversion by a Brillouin-induced phase change in single-mode fibers

R. G. Waarts, A. A. Friesem, and Y. Hefetz  »View Author Affiliations

Optics Letters, Vol. 13, Issue 2, pp. 152-154 (1988)

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The nonlinear phase change accompanying the gain induced by stimulated Brillouin scattering is investigated in single-mode fiber. A frequency-modulated signal, when counterpropagated by a strong pump wave, is converted to an amplitude-modulated signal owing to this nonlinear phase change. The measured amplitude modulation is in good agreement with the theoretical predictions. It is at its maximum for a frequency difference between the pump and signal waves that corresponds to the Brillouin Stokes shift ±0.5 full width at half-maximum of the Brillouin-gain bandwidth (90 MHz at λ = 820 nm). This conversion may lead to distortion in coherent transmission systems and Brillouin amplifiers.

© 1988 Optical Society of America

Original Manuscript: June 15, 1987
Manuscript Accepted: November 16, 1987
Published: February 1, 1988

R. G. Waarts, A. A. Friesem, and Y. Hefetz, "Frequency-modulated to amplitude-modulated signal conversion by a Brillouin-induced phase change in single-mode fibers," Opt. Lett. 13, 152-154 (1988)

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