Simplified analytic solutions and a novel fast algorithm for Yb³⁺-doped double-clad fiber lasers

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• 作者：Zhengqian Luo ; Chenchun Ye ; Guoyong Sun ; Zhiping Cai ; Miaoling Si ; Qibo Li
• 关键词：Double-clad fiber lasers ; Simplified analytic solutions ; Fast algorithm ; Numerical simulation
• 刊名：Optics Communications
• 出版年：2007
• 出版时间：1 September 2007
• 年：2007
• 卷：277
• 期：1
• 页码：118-124
• 全文大小：214 K

文摘

In this paper, continuous wave Yb³⁺-doped double-clad fiber lasers (DCFLs) with linear-cavity are investigated theoretically and numerically using the rate equations. Under the steady state conditions, the simplified analytic solutions of Yb³⁺-doped DCFLs under considering the scattering loss are deduced in the strongly pump condition. Compared with the known analytic solutions in published literatures, our analytic solutions are more accurate, especially, at higher reflectivity of output mirror. In addition, a fast and stable algorithm based on the Newton–Raphson method is proposed to simulate numerically Yb³⁺-doped DCFLs. The results by simplified analytic solutions are in good agreement with those by the numerical simulation. Moreover, we have performed the optimization of an Yb³⁺-doped DCFL using the simplified analytic solutions and the numerical simulations, respectively.