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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 14 — Jul. 15, 2007
  • pp: 2031–2033

Impact of two-photon absorption on self-phase modulation in silicon waveguides

Lianghong Yin and Govind P. Agrawal  »View Author Affiliations

Optics Letters, Vol. 32, Issue 14, pp. 2031-2033 (2007)

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We study the effects of two-photon absorption on the self-phase modulation (SPM) process in silicon waveguides while including both free-carrier absorption and free-carrier dispersion. An analytical solution is provided in the case in which the density of generated carriers is relatively low; it is useful for estimating spectral bandwidth of pulses at low repetition rates. The free-carrier effects are studied numerically with emphasis on their role on the nonlinear phase shift and spectral broadening. We also consider how the repetition rate of a pulse train affects the SPM process.

© 2007 Optical Society of America

OCIS Codes
(130.4310) Integrated optics : Nonlinear
(190.4360) Nonlinear optics : Nonlinear optics, devices

ToC Category:
Integrated Optics

Original Manuscript: March 22, 2007
Revised Manuscript: April 30, 2007
Manuscript Accepted: May 1, 2007
Published: July 5, 2007

Lianghong Yin and Govind P. Agrawal, "Impact of two-photon absorption on self-phase modulation in silicon waveguides," Opt. Lett. 32, 2031-2033 (2007)

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