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High power, high repetition rate, tunable broadband mid-IR source based on single-pass optical parametric generation of a femtosecond laser

机译:基于单通光学参数产生的飞秒激光器的高功率,高重复率,可调谐宽带中IR源

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摘要

We report on single-pass optical parametric generation for high power, high repetition rate (RR), ultrafast broadband optical radiation in the mid-IR. Taking advantage of broad phase-matching bandwidth (BW) of the crystals for the interacting waves having zero group velocity mismatch, we have used a 50 mm long MgO-doped periodically poled LiNbO3 crystal to develop a single-pass, parametric source producing femtosecond output pulses at a RR of 78 MHz. Pumping with a femtosecond Yb-fiber laser at 1064 nm, the source produces signal and idler radiation tunable across 1422-1561 nm and 4229-3342 nm, respectively. The signal radiation has a pulse and spectral BW of 296 fs and 9.2 nm centered at 1492 nm, respectively, with a time-BW product similar to 0.37, close to the transform limit. The idler radiation has spectral BW as high as 123 nm centered at 3709 nm. The source produces a signal (idler) beam of power of 2.07 W (0.54 W) at 1492 nm (3709 nm) in a Gaussian spatial profile with peak-to-peak passive power fluctuation better than 5% (4%) over 4 h at a single-pass conversion efficiency as high as similar to 55%. (C) 2017 Optical Society of America.
机译:我们报告了用于高功率,高重复率(RR)的单通光学参数生成,中外IR超快宽带光学辐射。利用具有零群速度不匹配的相互作用波的晶体的晶体的晶体匹配带宽(BW),我们使用了50毫米长的MgO掺杂的周期性的LINBO3晶体来开发单通过的参数源,产生飞秒输出在78 MHz的RR处脉冲。在1064nm下用飞秒YB光纤激光器泵送,源分别产生信号和惰轮可调谐,分别跨1422-1561nm和4229-3342nm。信号辐射具有296Fs的脉冲和光谱BW,分别以1492nm为中心的9.2nm,时间bw产品类似于0.37,接近变换极限。惰轮辐射具有高达123nm的光谱BW,以3709nm为中心。源在高斯空间轮廓中产生2.07W(0.54 W)的信号(惰轮)的功率波束,在高斯空间轮廓中,峰值峰值无源功率波动超过4小时,优于5%(4%)单通转换效率高达55%。 (c)2017年光学学会。

著录项

  • 来源
    《Optics Letters》 |2017年第15期|共4页
  • 作者

    Aadhi A.; Samanta G. K.;

  • 作者单位

    Phys Res Lab Photon Sci Lab Ahmadabad 380009 Gujarat India;

    Phys Res Lab Photon Sci Lab Ahmadabad 380009 Gujarat India;

  • 收录信息
  • 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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