Design of large-mode-area three layered fiber structure for femtosecond laser pulse delivery

作者：Babita^*; Rastogi Vipul; Kumar Ajeet

来源：Optics Communications, 2013, 293: 108-112.

DOI：10.1016/j.optcom.2012.11.092

• Optical fiber
• Ultra-short pulse
• Large-mode-area
• Femtosecond laser pulse delivery
• Pulse propagation
• High peak power

This paper presents three layered fiber that has been designed for delivering pulses of 100-fs through the fundamental mode. Design of the fiber ensures no intermodal coupling, low bending loss, and high fabrication tolerances while maintaining large-mode-area. We numerically demonstrate propagation of 55.5-kW peak power, 1550-nm wavelength, 100-fs duration laser pulse through fundamental mode of 4-m long fiber having mode area of 1900 mu m(2). Mode stability while propagation through the fiber has been ascertained by keeping enough spacing between the effective indices of LP01 and LP11 modes. Distortion-free propagation of the pulse has been achieved by keeping ratio of dispersion to nonlinear length close to 1.

• 出版日期2013-4-15