Generation of optical frequency combs in fibres

M. Zajnulina, J. M. Chavez Boggio, A. A. Rieznik, R. Haynes, M. M. Roth

Research output: Contribution to journalConference articlepeer-review


We numerically investigated the possibility of generating high-quality ultra-short optical pulses with broad frequencycombs spectra in a system consisting of three optical fibres. In this system, the first fibre is a conventional single-mode fibre, the second one is erbium-doped, and the last one is a low-dispersion fibre. The system is pumped with a modulated sine-wave generated by two equally intense lasers with the wavelengths λ ;1and λ2 such that their central wavelength is at λc = (λ1 + λ2)/2 = 1531 nm. The modelling was performed using the generalised nonlinear Schrödinger equation which includes the Kerr and Raman effects, as well as the higher-order dispersion and gain. We took a close look at the pulse evolution in the first two stages and studied the pulse behaviour depending on the group-velocity dispersion and the nonlinear parameter of first fibre, as well as the initial laser frequency separation. For these parameters, the optimum lengths of fibre 1 and 2 were found that provide low-noise pulses. To characterise the pulse energy content, we introduced a figure of merit that was dependent on the group-velocity dispersion, the nonlinearity of fibre 1, and the laser separation.

Original languageEnglish
Article number87750C
JournalProceedings of SPIE - International Society for Optical Engineering
Publication statusPublished - 3 May 2013
EventMicro-structured and specialty optical fibres II - Prague, Czech Republic
Duration: 15 Apr 201318 Apr 2013

Bibliographical note

Copyright 2013 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


  • Astrocombs
  • Astronomy
  • Four-wave mixing
  • Nonlinear Schrödinger equation
  • Optical frequency combs
  • Pulse compression
  • Ultra-short pulses


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