Journal of Shanghai Jiao Tong University (Science) ›› 2019, Vol. 24 ›› Issue (6): 754-762.doi: 10.1007/s12204-019-2122-2

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Theoretical Modelling of Cascaded Er3+-Doped, Tm3+-Doped and Nd3+-Doped Fibers for 0.4 to 2.0 μm Emission Spectra

NKONDE Sampa, JIANG Chun (姜淳)   

  1. (State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
  • 出版日期:2019-12-15 发布日期:2019-12-07
  • 通讯作者: NKONDE Sampa E-mail:nkondes@sjtu.edu.cn

Theoretical Modelling of Cascaded Er3+-Doped, Tm3+-Doped and Nd3+-Doped Fibers for 0.4 to 2.0 μm Emission Spectra

NKONDE Sampa, JIANG Chun (姜淳)   

  1. (State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
  • Online:2019-12-15 Published:2019-12-07
  • Contact: NKONDE Sampa E-mail:nkondes@sjtu.edu.cn

摘要: We present a cascaded system designed with Er3+-doped, Tm3+-doped and Nd3+-doped fibers to realize amplified spontaneous emission (ASE) spectra covering 0.4—2.0 μm. The system is excited with a pump laser emitting 808 nm photons with 500mW pump power. The emission spectra of the cascaded system covering 0.4—2.0 μm are realized with the Er3+, Tm3+ and Nd3+ ion doping densities optimized to 8 × 1019, 2 × 1020 and 8 × 1020 ion/m3, respectively, and the fiber length optimized to 1 m. Numerical methods reveal that the peak ASE power for the cascaded system can reach 20.9mW. A minimum ASE power of 4.39mW is attainable. Using numerical calculations and analytical techniques, we provide a detailed insight into optimized Er3+-doped, Tm3+- doped and Nd3+-doped fiber lengths and their doping concentrations for ASE power spectra covering 0.4—2.0 μm. We believe that the cascaded system can potentially provide significant applications in various optical fields which include but not limited to wavelength-division multiplexing, various optical communications and other salient medical imaging processes.

关键词: cascaded fiber, amplified spontaneous emission (ASE), rare-earth doped fiber

Abstract: We present a cascaded system designed with Er3+-doped, Tm3+-doped and Nd3+-doped fibers to realize amplified spontaneous emission (ASE) spectra covering 0.4—2.0 μm. The system is excited with a pump laser emitting 808 nm photons with 500mW pump power. The emission spectra of the cascaded system covering 0.4—2.0 μm are realized with the Er3+, Tm3+ and Nd3+ ion doping densities optimized to 8 × 1019, 2 × 1020 and 8 × 1020 ion/m3, respectively, and the fiber length optimized to 1 m. Numerical methods reveal that the peak ASE power for the cascaded system can reach 20.9mW. A minimum ASE power of 4.39mW is attainable. Using numerical calculations and analytical techniques, we provide a detailed insight into optimized Er3+-doped, Tm3+- doped and Nd3+-doped fiber lengths and their doping concentrations for ASE power spectra covering 0.4—2.0 μm. We believe that the cascaded system can potentially provide significant applications in various optical fields which include but not limited to wavelength-division multiplexing, various optical communications and other salient medical imaging processes.

Key words: cascaded fiber, amplified spontaneous emission (ASE), rare-earth doped fiber

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