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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 5 — Mar. 11, 2013
  • pp: 6045–6052

Supercontinuum-based 10-GHz flat-topped optical frequency comb generation

Rui Wu, Victor Torres-Company, Daniel E. Leaird, and Andrew M. Weiner  »View Author Affiliations

Optics Express, Vol. 21, Issue 5, pp. 6045-6052 (2013)

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The generation of high-repetition-rate optical frequency combs with an ultra-broad, coherent and smooth spectrum is important for many applications in optical communications, radio-frequency photonics and optical arbitrary waveform generation. Usually, nonlinear broadening techniques of comb-based sources do not provide the required flatness over the whole available bandwidth. Here we present a 10-GHz ultra-broadband flat-topped optical frequency comb (> 3.64-THz or 28 nm bandwidth with ~365 spectral lines within 3.5-dB power variation) covering the entire C-band. The key enabling point is the development of a pre-shaping-free directly generated Gaussian comb-based 10-GHz pulse train to seed a highly nonlinear fiber with normal dispersion profile. The combination of the temporal characteristics of the seed pulses with the nonlinear device allows the pulses to enter into the optical wave-breaking regime, thus achieving a smooth flat-topped comb spectral envelope. To further illustrate the high spectral coherence of the comb, we demonstrate high-quality pedestal-free short pulse compression to the transform-limited duration.

© 2013 OSA

OCIS Codes
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(060.4510) Fiber optics and optical communications : Optical communications
(060.5060) Fiber optics and optical communications : Phase modulation
(060.5530) Fiber optics and optical communications : Pulse propagation and temporal solitons
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(230.2090) Optical devices : Electro-optical devices
(320.5520) Ultrafast optics : Pulse compression

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: December 27, 2012
Revised Manuscript: February 14, 2013
Manuscript Accepted: February 23, 2013
Published: March 4, 2013

Rui Wu, Victor Torres-Company, Daniel E. Leaird, and Andrew M. Weiner, "Supercontinuum-based 10-GHz flat-topped optical frequency comb generation," Opt. Express 21, 6045-6052 (2013)

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