Ultra-high repetition rate absorption spectroscopy with low noise supercontinuum radiation generated in an all-normal dispersion fibre
Ultra-high repetition rate absorption spectroscopy with low noise supercontinuum radiation generated in an all-normal dispersion fibre
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DOI：
10.1088/1612-2011/11/7/075601
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发表时间：
2014-07-01
影响因子：
1.7
通讯作者：
Kaminski, C. F.
中科院分区：
文献类型：
--
作者：
Dupont, S.;Qu, Z.;Kaminski, C. F.
我们报告使用一个分散的超连续谱产生的全正常色散光纤记录低噪声光谱从大气分子至少一个数量级的速度比以前报道的。在标准的，异常色散光子晶体光纤中的超连续谱产生固有地与大的脉冲到脉冲波动相关联，如果不允许时间平均，则导致对高分辨率光谱的有害后果。用专门设计的全正常色散光子晶体光纤（PCF）代替标准光子晶体光纤（PCF），我们发现实现了基本上上级噪声性能，并且呈现其用于高重复率吸收光谱，其中光谱带宽覆盖数百nm的光谱可以以数百kHz的重复率捕获气体。
We report the use of a dispersed supercontinuum generated in an all-normal-dispersion fibre to record low-noise spectra from atmospheric molecules at least an order of magnitude faster than has been previously reported. Supercontinuum generation in standard, anomalous dispersion photonic-crystal fibres is inherently connected with large pulse-to-pulse fluctuations resulting in detrimental consequences for high resolution spectroscopy if temporal averaging is not permitted. Replacing the standard photonic-crystal fibre (PCF) with a specially designed all-normal dispersion PCF we find that a substantially superior noise performance is achieved and present its use for high repetition rate absorption spectroscopy where spectra covering hundreds of nm in spectral bandwidth can be captured of gases at hundreds of kHz repetition rates.