Numerical analysis of the beam quality and spectrum of wavelength-beam-combined laser diode arrays

Xuan Tang; Xiao-Jun Wang; Wei-Wei Ke

doi:10.1117/12.2065312

3 February 2015 Numerical analysis of the beam quality and spectrum of wavelength-beam-combined laser diode arrays

Xuan Tang, Xiao-Jun Wang, Wei-Wei Ke

Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 92551J (2015) https://doi.org/10.1117/12.2065312
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China

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.

Citation Download Citation

Xuan Tang, Xiao-Jun Wang, and Wei-Wei Ke "Numerical analysis of the beam quality and spectrum of wavelength-beam-combined laser diode arrays", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92551J (3 February 2015); https://doi.org/10.1117/12.2065312

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