Modeling of mode-locked fiber laser by combining of rate equation and nonlinear Schrödinger equation

Yu Zhao; Deshuang Zhao; Yongzhi Liu

doi:10.1117/12.756671

4 January 2008 Modeling of mode-locked fiber laser by combining of rate equation and nonlinear Schrodinger equation

Yu Zhao, Deshuang Zhao, Yongzhi Liu

Proceedings Volume 6839, Nonlinear Optics: Technologies and Applications; 68391P (2008) https://doi.org/10.1117/12.756671
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Models of mode-locked fiber laser include rate equation, Nonlinear Schr&diaero;dinger (NLS) equation model and time domain model. On the basis of combining the rate equation and NLS equation, we have developed a novel mode-locked fiber laser model, which can not only describe the dispersion and nonlinear effect of fiber, but also take consideration of the reciprocity of pump photon and signal photon. With the proposed model, we have made an investigation on the propagation characteristics of mode-locked signal, pump and amplified spontaneous emission (ASE) along longitudinal fiber by numerical method. The numerical results show that optical single pulse results from noise while the density of level 1 is decreasing and the density of level 2 is increasing. And the mode-locked pulse becomes stable when both of two densities are stable. The simulations also show that the pump and ASE power attenuate exponentially along longitudinal doped fiber, and the attenuation rates of pump and ASE power increase as the doped density does.

Citation Download Citation

Yu Zhao, Deshuang Zhao, and Yongzhi Liu "Modeling of mode-locked fiber laser by combining of rate equation and nonlinear Schrodinger equation", Proc. SPIE 6839, Nonlinear Optics: Technologies and Applications, 68391P (4 January 2008); https://doi.org/10.1117/12.756671

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KEYWORDS

Mode locking

Fiber lasers

Dispersion

Nonlinear optics

Signal attenuation

Picosecond phenomena

Laser development

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