Pulse collapse and blue-shifted enhanced supercontinuum in a photonic crystal fiber |
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Authors: | Liu Wen-Jun Pang Li-Hui Lin Xiang Gao Ren-Xi and Song Xiao-Wei |
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Institution: | Department of Optoelectronics Science,Harbin Institute of Technology at Weihai,Weihai 264209,China |
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Abstract: | The blue-shifted supercontinuum generation in a photonic crystal fiber pumped by high peak power femtosecond pulses with a wavelength located in the anomalous dispersion region is investigated experimentally and numerically.The formation of a blue-shifted enhanced supercontinuum due to the pulse collapse is demonstrated.The process of the pulse collapse is measured by using the grating-eliminated no-nonsense observation of ultrafast incident laser light e-fields technique(GRENOUILLE).Numerical simulations in spectral and temporal domains are conducted.The data from the numerical simulations are in good agreement with the experimental results.Our experimental results and numerical simulations show that pulse collapse is the determining factor in the generation of a blue-shifted supercontinuum. |
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Keywords: | femtosecond pulse ultrafast measurement supercontinuum |
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