Generation of optical frequency combs in fibres

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

doi:10.1117/12.2017167

3 May 2013 Generation of optical frequency combs in fibres

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

Proceedings Volume 8775, Micro-structured and Specialty Optical Fibres II; 87750C (2013) https://doi.org/10.1117/12.2017167
Event: SPIE Optics + Optoelectronics, 2013, Prague, Czech Republic

Abstract

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 λ₁and λ₂ such that their central wavelength is at λ_c = (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.

Citation Download Citation

M. Zajnulina, J. M. Chavez Boggio, A. A. Rieznik, R. Haynes, and M. M. Roth "Generation of optical frequency combs in fibres", Proc. SPIE 8775, Micro-structured and Specialty Optical Fibres II, 87750C (3 May 2013); https://doi.org/10.1117/12.2017167

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