基于BIB3O6的80kHz重复频率高功率光纤放大器平顶脉冲泵浦光参量啁啾脉冲放大

80 kHz repetition rate high power fiber amplifier flat-top pulse pumped OPCPA based on BIB3O6.

作者信息

Rothhardt J, Hädrich S, Limpert J, Tünnermann A

机构信息

Friedrich Schiller University Jena, Institute of Applied Physics, Albert-Einstein-Str. 15, 07745 Jena, Germany.

出版信息

Opt Express. 2009 Feb 16;17(4):2508-17. doi: 10.1364/oe.17.002508.

DOI:10.1364/oe.17.002508

PMID:19219154

Abstract

We present a high peak power optical parametric chirped pulse amplifier (OPCPA) seeded by a cavity dumped Ti:Sapphire oscillator. A frequency doubled high power Ytterbium-doped fiber amplifier is pumping the device. Temporal synchronization of the pump pulses is done via soliton generation in a highly nonlinear photonic crystal fiber. This soliton is fiber amplified and spectrally filtered in several fiber amplifiers. A simple birefringent pulse shaper generates a flat-top temporal pump pulse profile. Direct amplification of these pulses in large mode area fibers without using a stretcher and compressor provides significantly reduced complexity. For the first time to our knowledge broadband amplification around 800 nm central wavelength is demonstrated in BIB(3)O(6) (BIBO) crystals. The stretched Ti:Sapphire oscillator pulses are amplified up to a pulse energy of 25 microJ. Recompression with a grating compressor yields 50.7 fs pulses with 16.2 microJ pulse energy.

摘要

我们展示了一种由腔倒空钛宝石振荡器作为种子源的高峰值功率光学参量啁啾脉冲放大器（OPCPA）。一个倍频高功率掺镱光纤放大器为该装置提供泵浦。泵浦脉冲的时间同步通过在高非线性光子晶体光纤中产生孤子来实现。这个孤子在多个光纤放大器中被光纤放大并进行光谱滤波。一个简单的双折射脉冲整形器产生平顶的时间泵浦脉冲轮廓。在不使用展宽器和压缩器的情况下，在大模场面积光纤中直接放大这些脉冲可显著降低复杂度。据我们所知，首次在BIB(3)O(6)（BIBO）晶体中实现了中心波长约800 nm的宽带放大。展宽后的钛宝石振荡器脉冲被放大到25微焦的脉冲能量。用光栅压缩器进行再压缩产生了脉宽为50.7飞秒、脉冲能量为16.2微焦的脉冲。