Femtosecond pulse delivery around 1560 nm in large-core anti-resonant fibers

Dominik Dobrakowski, Anupamaa Rampur, G. Stępniewski, D. Pysz, Luming Zhao, Y. Stepanenko, R. Buczyński, M. Klimczak
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Abstract

Hollow core, anti-resonant fiber with 65 μm core diameter is used for transmission of ultrashort laser pulses under 100 fs at a central wavelength of 1560 nm from a mode-locked laser. Meter-scale lengths of the fiber (up to 3 m) and bend radii down to 6 cm are considered. Cross-correlation frequency-resolved optical gating is used for investigation of performance of the fiber in this application. Achieved results on dispersive stretching of the pulse up to around 200 fs are compared with nonlinear propagation simulations, performed using the generalized nonlinear Schrödinger equation parametrized with measured characteristics of the fiber. Dechirping of the pulse to its original shape in the fiber under bending is observed and related to suppression of higher-order modes. As shown, the proposed fiber can be used to transmit sub-100 fs long laser pulses without spectral or temporal distortions providing a 6 cm radius loop.
在大芯抗谐振光纤中约1560nm的飞秒脉冲传输
采用芯径为65 μm的空心抗谐振光纤,从锁模激光器传输中心波长为1560nm、波长为100fs的超短激光脉冲。考虑到光纤的米级长度(最大3米)和弯曲半径小至6厘米。在此应用中,采用互相关频率分辨光门控技术来研究光纤的性能。利用光纤实测特性参数化的广义非线性Schrödinger方程进行了非线性传输仿真,并与仿真结果进行了比较。观察到脉冲在弯曲下在光纤中恢复到其原始形状,这与高阶模式的抑制有关。如图所示,所提出的光纤可用于传输低于100 fs长的激光脉冲,没有光谱或时间畸变,提供6厘米半径的环路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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