Comparison between Analytical Solution and Experimental Setup of a Short Long Ytterbium Doped Fiber Laser

M. R. A. Moghaddam, S. W. Harun, H. Ahmad

Photonics Research Center, University of Malaya, Kuala Lumpur, Malaysia.

DOI: 10.4236/opj.2012.22010                

Abstract

In this research, Amplified Spontaneous Emission (ASE) spectrum characteristics for a highly Yb³⁺ doped glass fiber with different pump powers and pump wavelengths are scrutinized. ASE spectral profile and wavelength shift corresponding to different optical fiber lengths are measured. Highly-doped Yb³⁺ fiber lasers in a linear-cavity are both experimentally and analytically investigated. Rate equations are solved using quasi-numerical models. Numerical results are reported for wide range of operating conditions to enable design optimization. The model takes into account the scattering loss and the distributed laser loss power density in strongly pump condition. The effects of various parameters such as pump power, pump wavelength, signal wavelength and fiber length on the output power and laser threshold are studied. Theoretical results are shown to be in good agreement with the experimental data.

Keywords

Ytterbium Doped Fiber; ASE; Rate Equation; Runge-Kutta

Conflicts of Interest

The authors declare no conflicts of interest.

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