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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 33, Iss. 16 — Aug. 15, 2008
  • pp: 1822–1824

Lossless equalization of frequency combs

Víctor Torres-Company, Jesús Lancis, and Pedro Andrés  »View Author Affiliations


Optics Letters, Vol. 33, Issue 16, pp. 1822-1824 (2008)
http://dx.doi.org/10.1364/OL.33.001822


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Abstract

Frequency combs obtained by sinusoidal phase modulation of narrowband cw lasers are widely used in the field of optical communications. However, the resulting spectral envelope of the comb is not flat. We propose a general and efficient approach to achieve flat frequency combs with tunable bandwidth. The idea is based on a two-step process. First, efficient generation of a train with a temporal flat-top-pulse profile is required. Second, we use large parabolic phase modulation in every train period to map the temporal intensity shape into the spectral domain. In this way the resulting spectral envelope is flat, and the size is tunable with the chirping rate. Two different schemes are proposed and verified through numerical simulations.

© 2008 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.5060) Fiber optics and optical communications : Phase modulation
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(230.2090) Optical devices : Electro-optical devices

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: May 1, 2008
Revised Manuscript: June 16, 2008
Manuscript Accepted: June 27, 2008
Published: August 6, 2008

Citation
Víctor Torres-Company, Jesús Lancis, and Pedro Andrés, "Lossless equalization of frequency combs," Opt. Lett. 33, 1822-1824 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-16-1822

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