Generation of high quality, 1.3 cycle pulses by active phase control of an octave spanning supercontinuum
Generation of high quality, 1.3 cycle pulses by active phase control of an octave spanning supercontinuum
复制标题
DOI：
10.1364/oe.19.020151
复制
发表时间：
2011-10-10
期刊：
影响因子：
3.8
通讯作者：
Tuennermann, Andreas
中科院分区：
文献类型：
--
作者：
Demmler, Stefan;Rothhardt, Jan;Tuennermann, Andreas
利用全正常色散光子晶体光纤（ANDi PCF）产生超宽带超连续谱（SC）实现了非线性脉冲压缩。利用Ti：Sapphire振荡器产生的6 fs、3 nJ脉冲泵浦13 mm厚的ANDi PCF，获得了高相干、平滑的倍频程SC谱。应用有源相位控制已经能够产生4.5 fs脉冲。额外的光谱振幅整形增加了SC光谱的带宽，进一步导致具有3.64 fs的持续时间的几乎变换限制的脉冲，其对应于在810 nm的中心波长处仅1.3个光学周期。这是迄今为止通过压缩PCF中产生的SC光谱实现的最短脉冲持续时间。由于所产生的SC的高稳定性和平滑的光谱强度和相位分布，实现了相对于前脉冲和后脉冲表现出14 dB的脉冲对比度的优异的时间脉冲质量。(C)2011年美国光学学会
Nonlinear pulse compression based on the generation of ultra-broadband supercontinuum (SC) in an all-normal dispersion photonic crystal fiber (ANDi PCF) is demonstrated. The highly coherent and smooth octave-spanning SC spectra are generated using 6 fs, 3 nJ pulses from a Ti:Sapphire oscillator for pumping a 13 mm piece of ANDi PCF. Applying active phase control has enabled the generation of 4.5 fs pulses. Additional spectral amplitude shaping has increased the bandwidth of the SC spectra further leading to nearly transform-limited pulses with a duration of 3.64 fs, which corresponds to only 1.3 optical cycles at a central wavelength of 810 nm. This is the shortest pulse duration achieved via compression of SC spectra generated in PCF to date. Due to the high stability and the smooth spectral intensity and phase distribution of the generated SC, an excellent temporal pulse quality exhibiting a pulse contrast of 14 dB with respect to the pre- and post-pulses is achieved. (C) 2011 Optical Society of America