Modeling Nd³⁺-Yb³⁺-Tm³⁺-Er³⁺ Codoped Telluride Glass Fiber for 0.4 to 2.0 μm Emission Spectra

【摘要】 The modeling of rare-earth-doped fiber amplifier is accomplished by utilizing the rate and propagation equations of distinct levels for a laser medium. A complex theoretical model for neodymium(Nd³⁺), erbium(Er³⁺),thulium(Tm³⁺) and ytterbium(Yb³⁺) codoped telluride glass fiber covering 0.4—2.0 μm emission spectra is presented. The emission spectra of Nd³⁺-Er³⁺-Tm³⁺-Yb³⁺codoped telluride fiber are realized with the excitation of both 808 and 980 nm lasers pumped at 500 mW. Numerical methods are used to calculate the emission spectra covering 0.4—2.0 μm. With the Nd³⁺, Tm³⁺and Yb³⁺ion concentrations fixed at 2 × 1020 ion/m³, the Er³⁺ion concentration optimized to 8 × 10²⁰ ion/m³ and the fiber length spanning from 0.5 to 2 m, a peak amplified spontaneous emission（ASE） power of 19.8 mW is attainable, and a minimum ASE power of 7.96 mW can also be achieved. The analytical techniques and results indicate that when a telluride codoped fiber with suitable ion concentrations of Nd³⁺, Er³⁺, Tm³⁺and Yb³⁺is excited by both 980 and 808 nm pump lasers, 0.4—2.0 μm emission spectra are attainable for vast optical applications.更多还原

【Abstract】 The modeling of rare-earth-doped fiber amplifier is accomplished by utilizing the rate and propagation equations of distinct levels for a laser medium. A complex theoretical model for neodymium(Nd³⁺), erbium(Er³⁺),thulium(Tm³⁺) and ytterbium(Yb³⁺) codoped telluride glass fiber covering 0.4—2.0 μm emission spectra is presented. The emission spectra of Nd³⁺-Er³⁺-Tm³⁺-Yb³⁺codoped telluride fiber are realized with the excitation of both 808 and 980 nm lasers pumped at 500 mW. Numerical methods are used to calculate the emission spectra covering 0.4—2.0 μm. With the Nd³⁺, Tm³⁺and Yb³⁺ion concentrations fixed at 2 × 1020 ion/m³, the Er³⁺ion concentration optimized to 8 × 10²⁰ ion/m³ and the fiber length spanning from 0.5 to 2 m, a peak amplified spontaneous emission（ASE） power of 19.8 mW is attainable, and a minimum ASE power of 7.96 mW can also be achieved. The analytical techniques and results indicate that when a telluride codoped fiber with suitable ion concentrations of Nd³⁺, Er³⁺, Tm³⁺and Yb³⁺is excited by both 980 and 808 nm pump lasers, 0.4—2.0 μm emission spectra are attainable for vast optical applications.更多还原