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Low-threshold performance of fiber Bragg grating external-cavity semiconductor lasers using genetic algorithms

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Abstract

The lowest threshold current of the external-cavity semiconductor laser with fiber Bragg grating using genetic algorithms is investigated. Effects of the external cavity length, coupling efficiency and anti-reflection coating reflectivity on static characteristics, such as L-I curves and side mode suppression ratios (SMSR) are investigated by using multi-mode rate equation. It is found that the reflectivity of the anti-reflection coating for low-threshold performance needs to be increased at the cost of the stability of the fiber grating external-cavity semiconductor laser. The optimal external cavity length obtained by genetic algorithms can be used to obtain the lowest threshold current for sacrificing a little SMSR. However, with the decrease of AR-coating reflectivity, output powers and SMSRs are slightly dependent on the external cavity length.

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Authors and Affiliations

  1. Wuhan National Laboratory for Optoelectronics, Institute of Optoelectronics Science & Engineering, Huazhong University of Science and Technology, Wuhan, 430074, People’s Republic of China

    X. Y. He, D. X. Huang & Yonglin Yu

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  1. X. Y. He
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  2. D. X. Huang
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  3. Yonglin Yu
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Correspondence to X. Y. He.

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He, X.Y., Huang, D.X. & Yu, Y. Low-threshold performance of fiber Bragg grating external-cavity semiconductor lasers using genetic algorithms. Opt Quant Electron 40, 475–484 (2008). https://doi.org/10.1007/s11082-008-9233-6

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  • DOI: https://doi.org/10.1007/s11082-008-9233-6

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