Max Planck Institute for the Science of Light, Günther-Scharowsky-Strasse 1, 91058 Erlangen, Germany.
Opt Lett. 2012 Mar 1;37(5):770-2. doi: 10.1364/OL.37.000770.
We report the formation of an ultrabroad supercontinuum down to 280 nm in the deep UV by pumping sharply tapered (5-30 mm taper lengths) solid-core photonic crystal fibers with 130 fs, 2 nJ pulses at 800 nm. The taper moves the point of soliton fission to a position where the core is narrower, a process that requires normal dispersion at the input face of the fiber. We find that the generation of deep-UV radiation is limited by strong two-photon absorption in the silica.
我们报告了一种通过用 800nm 的 130fs、2nJ 脉冲泵浦急剧变细的（5-30mm 的变细长度）固体芯光子晶体光纤，在深紫外区形成了一个超宽带的超连续谱，其带宽可低至 280nm。变细过程将孤子分裂的点移动到了芯更细的位置，这一过程需要光纤输入面的正常色散。我们发现深紫外辐射的产生受到二氧化硅中强双光子吸收的限制。
