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Ultraflat broadband supercontinuum in highly nonlinear Ge11.5As24Se64.5 photonic crystal fibres
1Sandeep Vyas, 2Takasumi Tanabe, 3Manish Tiwari and 4Ghanshyam Singh

1Dept. of ECE, Vivekananda Institute of Technology, Jaipur, India
2Dept. of EEE, Keio University, Kanagawa, Japan
3Dept. of ECE, Manipal University, Jaipur, India
4Dept. of ECE, Malaviya National Institute of Technology, Jaipur, India

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Abstract. We demonstrate numerically a possible generation of a mid-infrared (1–10 µm) supercontinuum, using highly nonlinear Ge11.5As24Se64.5-based photonic crystal fibres. This ultra-broadband supercontinuum is achieved with a 100 mm long photonic crystal fibre pumped using 85 fs laser pulses at 3.1 µm with the peak power 3 kW. A broad and flat dispersion profile of the Ge11.5As24Se64.5-based photonic crystal fibre combined with a high nonlinearity result in the hyper-broadband supercontinuum. 

Keywords: photonic crystal fibres, chromatic dispersion, effective mode area, supercontinuum generation

PACS: 42.55.Tv
UDC: 535
Ukr. J. Phys. Opt. 17 132-139
doi: 10.3116/16091833/17/3/132/2016

Received: 29.06.2016

Анотація. 
У статті чисельно продемонстровано можливість генерації суперконтинууму середньому інфрачервоному діапазоні 1–10 мкм із використанням фотонно-кристалічного оптичного волокна на основі високонелінійного Ge11.5As24Se64.5. Цей ультра-широкосмуговий суперконтинуум досягається у фотонно-кристалічному волокні довжиною 100 мм при нагнітанні 85 фемтосекундними лазерними імпульсами з довжиною хвилі 3,1 мкм і піковою потужністю 3 кВт. Широкий і плоский профіль дисперсії фотонно-кристалічного волокна на основі Ge11.5As24Se64.5 у поєднанні з його високою нелінійністю дає змогу генерувати гіперширокосмуговий суперконтинуум.
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