Mid-infrared optical parametric oscillator pumped by an amplified random fiber laser

Yaping Shang, M. Shen, Peng Wang, Xiao Li, Xiaojun Xu
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Abstract

Recently, the concept of random fiber lasers has attracted a great deal of attention for its feature to generate incoherent light without a traditional laser resonator, which is free of mode competition and insure the stationary narrow-band continuous modeless spectrum. In this Letter, we reported the first, to the best of our knowledge, optical parametric oscillator (OPO) pumped by an amplified 1070 nm random fiber laser (RFL), in order to generate stationary mid-infrared (mid-IR) laser. The experiment realized a watt-level laser output in the mid-IR range and operated relatively stable. The use of the RFL seed source allowed us to take advantage of its respective stable time-domain characteristics. The beam profile, spectrum and time-domain properties of the signal light were measured to analyze the process of frequency down-conversion process under this new pumping condition. The results suggested that the near-infrared (near-IR) signal light ‘inherited’ good beam performances from the pump light. Those would be benefit for further develop about optical parametric process based on different pumping circumstances.
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放大型随机光纤激光器抽运的中红外光参量振荡器
近年来,随机光纤激光器因其无需传统的激光谐振腔即可产生非相干光,避免了模式竞争,保证了固定窄带连续无模频谱的特性而受到广泛关注。在本文中,我们报道了据我们所知的第一个由放大的1070 nm随机光纤激光器(RFL)泵浦的光参量振荡器(OPO),以产生静止的中红外(middle - ir)激光。实验在中红外范围内实现了瓦级激光输出,且运行相对稳定。RFL种子源的使用使我们能够利用其各自稳定的时域特性。测量了信号光的光束轮廓、频谱和时域特性,分析了该泵浦条件下的频率降阶过程。结果表明,近红外信号光“继承”了泵浦光良好的光束性能。这将有利于基于不同泵浦光参量过程的进一步发展。
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