Lorek E, Larsen E W, Heyl C M, Carlström S, Paleček D, Zigmantas D, Mauritsson J
Department of Physics, Lund University, Box 118, 221 00 Lund, Sweden.
Department of Chemical Physics, Lund University, Box 124, 221 00 Lund, Sweden.
Rev Sci Instrum. 2014 Dec;85(12):123106. doi: 10.1063/1.4902819.
We generate high-order harmonics at high pulse repetition rates using a turnkey laser. High-order harmonics at 400 kHz are observed when argon is used as target gas. In neon, we achieve generation of photons with energies exceeding 90 eV (∼13 nm) at 20 kHz. We measure a photon flux of up to 4.4 × 10(10) photons per second per harmonic in argon at 100 kHz. Many experiments employing high-order harmonics would benefit from higher repetition rates, and the user-friendly operation opens up for applications of coherent extreme ultra-violet pulses in new research areas.
我们使用交钥匙激光器以高脉冲重复率产生高次谐波。当使用氩气作为靶气体时，观察到了400千赫兹的高次谐波。在氖气中，我们在20千赫兹时实现了能量超过90电子伏特（约13纳米）的光子产生。我们测量到在100千赫兹时氩气中每个谐波每秒高达4.4×10¹⁰个光子的光子通量。许多采用高次谐波的实验将受益于更高的重复率，并且这种用户友好的操作开启了相干极紫外脉冲在新研究领域的应用。
