Efficient frequency upshift of 10fs laser pulses propagating in a 5-cm length birefringent photonic crystal fibre
Li Shu-Guang(李曙光)a)b)†, Zhang Wei(张炜)a), Wei Zhi-Yi(魏志义)a), Zhou Gui-Yao(周桂耀)b), and Hou Lan-Tian(侯蓝田)b)
aLaboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; bKey Laboratory of Metastable Materials Science and Technology, College of Science, Yanshan University, Qinhuangdao 066004, China
Abstract This paper reports that a 5-cm length birefringent photonic crystal fibre is used to tune the output frequency of unamplified 10-fs Ti:sapphire pulses. The zero dispersion of the fibre is at 823 nm and 800 nm for slow and fast fundamental modes, respectively. It is demonstrated that efficient upshift of the output frequency can be achieved when the pumped radiation is polarized along the slow axis of the fibre. When the average input power reaches 320 mW, about 60% of the output energy is located in one peak at 600 nm and is accompanied by depletion of the pulse inside the anomalous dispersion region.
Received: 24 August 2008
Revised: 09 November 2008
Accepted manuscript online:
Fund: Project
supported by the National Natural Science Foundation of China (Grant
Nos 10874145 and 60490280), the China Postdoctoral Science
Foundation (Grant No 20080440014), and the Yanshan University Doctor
Foundation of China (Grant
No B153).
Cite this article:
Li Shu-Guang(李曙光), Zhang Wei(张炜), Wei Zhi-Yi(魏志义), Zhou Gui-Yao(周桂耀), and Hou Lan-Tian(侯蓝田) Efficient frequency upshift of 10fs laser pulses propagating in a 5-cm length birefringent photonic crystal fibre 2009 Chin. Phys. B 18 1996
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