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Efficiency increase of distributed feedback Raman fiber lasers by dynamic control of the phase shift

机译:通过动态控制相移的分布式反馈拉曼光纤效率增加

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摘要

pi-phase-shifted distributed feedback, ultralong fiber Bragg gratings (FBGs) with Raman gain have been shown to be excellent ultranarrow single-frequency lasers that can be operated at any wavelength. However, these lasers have shown unusually low slope efficiency (1%-10%), while theoretical simulations predict a much higher (30%-60%) number. We believe this poor performance is due to a thermally induced phase shift inside the FBG due to absorption of the high intensity of the signal oscillating in the cavity. To compensate for this, a thermally controlled dynamic phase shift is proposed to increase efficiency after lasing first occurs. We show here an increase in the slope efficiency of a factor of 4 and an increase in the total output efficiency by a factor of 6.5 with 6W of pump power by reducing the phase shift once the laser begins oscillating. (C) 2018 Optical Society of America
机译:PI相移位的分布式反馈,具有拉曼增益的超龙纤维布拉格光栅(FBG)已被示出为优异的超声单频激光器,其可以在任何波长下操作。 然而,这些激光器已经表现出异常低的斜率效率(1%-10%),而理论模拟预测高得多(30%-60%)数量。 我们认为这种差的性能是由于FBG内部的热诱导相移,由于在腔中振荡的信号高强度的吸收。 为了补偿这一点,提出了一种热控动态相移,以提高激光后提高效率。 我们在这里展示了斜率效率的增加,并且通过在激光开始振荡时,通过减小相移泵功率的总输出效率的总输出效率增加了6.5。 (c)2018年光学学会

著录项

  • 来源
    《Optics Letters》 |2018年第23期|共4页
  • 作者单位

    Polytech Montreal Engn Phys Dept 2900 Edouard Montpetit Blvd Montreal PQ Canada;

    Polytech Montreal Engn Phys Dept 2900 Edouard Montpetit Blvd Montreal PQ Canada;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

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