Authors : M. Sura Hussein, Tahreer Safa`a Mansour, H. Yousif Ibrahim and M. Laith Tariq
Abstract: Pulse compression can be generated high-quality ultrashort pulses at 1550 nm by applying force on the Photonic Crystal Fibers (PCFs). This study focused on the ability of discrimination between two laser pulses that generated by using two core Hollow Core Photonic Crystal Fibers (HC-PCFs) 19 and 7 cells. The first laser source has wavelength 1546.74 nm and FWHM 155.7 ps. While the second laser has wavelength 1551.95 nm and FWHM 183.3 pm. After these two laser pulses propagated via. the two cores of HC-PCFs and applying the mechanical force with different sets on the cross sections of these fibers. The central wavelength will be shifted and FWHM will be changed. The first laser pulse, minimum Full Width at Half Maximum (FWHM) was obtained that is 117.78 ps with central wavelength 1547.06 nm in the case of 2 kg weight applied on the cross section of 7 cells PCF with compression factor 1.3. But for the second laser source minimum FWHM and central wavelength were obtained when the mechanical force of 0.5kg applied on the cross section of 19 cells PCF that are 120.62 pm, 1550.101 nm, respectively with compression factor 1.5. The applying force on the PCF to achieve the exponentially decreasing dispersion and exponentially increasing nonlinearity profiles which turn out to be the fundamental requirements for generating the chirped self-similar pulses.
M. Sura Hussein, Tahreer Safa`a Mansour, H. Yousif Ibrahim and M. Laith Tariq, 2018. Pulse Compression by Using 7 and 19 Cells 1550 Hollow Core Photonic Crystal Fiber. Journal of Engineering and Applied Sciences, 13: 7198-7204.