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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 4 — Feb. 15, 2013
  • pp: 446–448

Digital broadband linearization of optical links

Daniel Lam, Ali M. Fard, Brandon Buckley, and Bahram Jalali  »View Author Affiliations

Optics Letters, Vol. 38, Issue 4, pp. 446-448 (2013)

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We present a digital postprocessing linearization technique to efficiently suppress dynamic distortions added to a wideband signal in an analog optical link. Our technique achieves up to 35 dB suppression of intermodulation distortions over multiple octaves of signal bandwidth. In contrast to conventional linearization methods, it does not require excessive analog bandwidth for performing digital correction. This is made possible by regenerating undesired distortions from the captured output, and subtracting it from the distorted digitized signal. Moreover, we experimentally demonstrate a record spurious-free dynamic range of 120dB·Hz2/3 over a 6 GHz electrical signal bandwidth. While our digital broadband linearization technique advances state-of-the-art optical links, it can also be applied to other nonlinear dynamic systems.

© 2013 Optical Society of America

OCIS Codes
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 8, 2012
Revised Manuscript: January 4, 2013
Manuscript Accepted: January 10, 2013
Published: February 8, 2013

Daniel Lam, Ali M. Fard, Brandon Buckley, and Bahram Jalali, "Digital broadband linearization of optical links," Opt. Lett. 38, 446-448 (2013)

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