21 August 2009 High pumping-efficiency and wideband L-band erbium-doped fiber ASE source using two-stage double-pass backward pumping configuration
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Abstract
We present a wideband and high pumping-efficiency L-band erbium-doped fiber (EDF) amplified spontaneous emission (ASE) source using a two-stage double pass backward (DPB) pumping configuration.DPB configuration has been proved to have a high pumping-efficiency. In this paper we use a two-stage DPB pumping configuration to generate a stable L-band ASE source for the first time. The source consists of two sections of EDF, a 1480nm pumping laser diode (LD) which is divided into two portions to pump two sections of EDF separately. By using a power splitter, the pumping power of two stages can be adjusted proportionally. The effects of EDF length and pump power arrangement on the output characteristics of L-band ASE spectrum, output power and mean wavelength are theoretically investigated. The results show that the pumping-conversion efficiency and the linewidth can be improved significantly by optimizing the fiber length ratio and pump ratio of the two-stage DPB configuration. Based on former work, the total fiber length is chosen at 19m in this paper. With the total fiber length fixed, the proposed source has a high pumping efficiency of 53%, an output power of 111mW, and a broadening linewidth of 49nm with the mean wavelength at 1580.18nm under the optimizing fiber ratio of 0.842 and pump power ratio of 0.5.
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Benrui Zheng, Wencai Huang, "High pumping-efficiency and wideband L-band erbium-doped fiber ASE source using two-stage double-pass backward pumping configuration", Proc. SPIE 7423, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI, 74230S (21 August 2009); doi: 10.1117/12.825080; https://doi.org/10.1117/12.825080
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