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铒镱共掺光纤由于具有非常宽的吸收带,被广泛应用于激光雷达、激光探测等技术,随着线偏振光纤激光器的飞速发展,保偏型铒镱共掺光纤的制备技术也受到了广泛关注。本文中,利用改进的化学气相沉积(MCVD)技术与疏松体液相掺杂相结合的方式制备了保偏型铒镱共掺光纤预制棒,从铒/镱离子的发光特性及机理出发,通过研究不同打孔工艺、应力区参数对保偏及吸收性能的影响,从而确定了合适的工艺参数;此外,还研究了不同掺磷含量对光纤吸收及光谱性能的影响,最终通过稀土离子共掺工艺的研究,将保偏型铒镱共掺光纤在1530nm处的纤芯吸收系数提升至85dB/m,掺P含量从5mol%提升至10~12mol%,光纤激光斜效率达到35%,极大改善了铒镱共掺光纤的光学性能。
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