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Fiber Raman Amplifiers and Fiber Raman Lasers

机译:光纤拉曼放大器和光纤拉曼激光器

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摘要

Stimulated Raman scattering (SRS) is a nonlinear optical effect, observed for the first time in 1962, which lies at the heart of fiber Raman amplifiers and fiber Raman lasers. SRS can be obtained by irradiating a sample with two simultaneous light sources: a light wave at frequency ωL (the pump laser wave) and a light wave at frequency ωS = ωL − ωυ (the Stokes Raman wave), where ħωυ corresponds to a vibrational energy. When the frequency difference between the pump and the Stokes laser beams matches a given molecular vibrational frequency of the sample under test, there is a transfer of energy from the high power pump beam to the probe beam, which can be co-propagating or counter-propagating. The SRS effect occurs in the form of a gain for the Stokes beam power. In SRS, many Stokes frequencies can be generated at the output when the pump power exceeds the threshold value, thus Stokes frequencies at ωP − ων, ωP − 2ων can be observed, leading to the so-called “cascaded” SRS [1]. In the last two decades, a renewed interest has been addressed to SRS due to interesting applications in nano [2,3,4] and biophotonics [5,6]. However, in the field in which SRS manifests, at the best, its potentiality is fiber optics [7,8,9,10]. Fiber optics amplifiers and lasers based on SRS are related to basic physics aspects and a vast number of applications, at the same time.
机译:刺激的拉曼散射(SRS)是一种非线性光学效应,这是1962年第一次观察到的,这位于光纤拉曼放大器和光纤拉曼激光器的心脏。通过用两个同时光源照射样品可以获得Srs:频率ωl(泵激光波)的光波和频率ωs=ωl - ων(Stokes拉曼波),其中ħωυ对应于振动活力。当泵和斯托克斯激光束之间的频率差与被测样品的给定分子振动频率匹配时,从高功率泵梁到探头梁的电能传递,这可以是共传播的或反击传播。 SRS效应以斯托克斯梁功率的增益的形式发生。在SRS中,当泵功率超过阈值时,可以在输出处产生许多速度频率,从而可以观察到ωp - ων,ωp - 2ων的频率,导致所谓的“级联”Srs [1]。在过去的二十年中,由于纳米[2,3,4]和生物照相学中有趣的应用,已经向SRS解决了重新兴趣的兴趣[5,6]。然而,在SRS表现出来的领域,其潜力是光纤[7,8,9,10]。基于SRS的光纤放大器和激光器与基本物理方面和广大应用程序同时有关。

著录项

  • 期刊名称 Micromachines
  • 作者

    Luigi Sirleto;

  • 作者单位
  • 年(卷),期 2020(11),12
  • 年度 2020
  • 页码 1044
  • 总页数 5
  • 原文格式 PDF
  • 正文语种
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