Experiment and Numerical Modeling of High-Power Passively Q-Switched Ytterbium-Doped Double-Clad Fiber Lasers
| Autor: | Ilya Utkin, Lei Pan, Robert Fedosejevs |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Amplified spontaneous emission
Materials science business.industry Physics::Optics Pulse duration Saturable absorption Condensed Matter Physics Laser Q-switching Atomic and Molecular Physics and Optics law.invention Optical pumping Double-clad fiber Optics law Fiber laser Electrical and Electronic Engineering business |
| Zdroj: | IEEE Journal of Quantum Electronics. 46:68-75 |
| ISSN: | 0018-9197 |
| DOI: | 10.1109/jqe.2009.2028031 |
| Popis: | Two high-power and high-repetition-rate passively Q-switched Yb-doped double-clad fiber lasers have been demonstrated with small (5.4 ?m) and medium (10 ?m) core diameters using Cr4+ :YAG as an external saturable absorber. At a pump power of 13.8 W, 7.8 W single-mode outputs have been obtained with a pulse repetition rate of 120 kHz, pulse energy of 65 ?J , and pulse duration of 116 ns. A theoretical model is developed to predict the laser spectrum and numerically simulate the output characteristics versus pump power. The focused beam in Cr4+:YAG is assumed to have a Gaussian profile and is analyzed using traveling wave rate equations. The effect of amplified spontaneous emission is also investigated in the simulation, which shows reasonable agreement with experimental observations. |
| Databáze: | OpenAIRE |
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