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Proceedings Paper

Numerical analysis of the beam quality and spectrum of wavelength-beam-combined laser diode arrays
Author(s): Xuan Tang; Xiao-Jun Wang; Wei-Wei Ke
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Paper Abstract

In this paper, a numerical model is presented to simulation the performance of the wavelength-beam-combined laser diode arrays (LDA) system. The eigen mode expansion method is used to describe the two-dimensional optical amplification and the strength of field feedback of external cavity. To describe the mode competition in laser diodes, the gain saturation effect is considered. The two-dimension distributions of the carrier concentration, recombination rates, and optical gain are calculated for solving the laser dynamic equation. The Fresnel integration, grating equation and mode overlap integration are used to obtain the feedback coefficient of extent cavity diffraction. Quantum noise is considered to evaluate the spectral linewidth of semiconductor laser. Based on the numerical model, the impact of the mutual optical feedback on the beam quality and spectrum of the LDA is present and analysis.

Paper Details

Date Published: 3 February 2015
PDF: 8 pages
Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92551J (3 February 2015); doi: 10.1117/12.2065312
Show Author Affiliations
Xuan Tang, China Academy of Engineering Physics (China)
Institute of Applied Physics and Computational Mathematics (China)
Xiao-Jun Wang, China Academy of Engineering Physics (China)
Institute of Applied Physics and Computational Mathematics (China)
Wei-Wei Ke, China Academy of Engineering Physics (China)
Institute of Applied Physics and Computational Mathematics (China)


Published in SPIE Proceedings Vol. 9255:
XX International Symposium on High-Power Laser Systems and Applications 2014
Chun Tang; Shu Chen; Xiaolin Tang, Editor(s)

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