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- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
- Department of Environmental Applications, National Institute of Laser NILES, Cairo University, Cairo, Egypt
In this work, new optimization conditions to increasing the optical throughput of neon-filled hollow-core fiber for very broad optical bandwidth and reach extremely-short laser pulses are represented. In the used method, seed pulses from a Ti:sapphire mode locked laser of 18 fs pulses with energy 5 nJ/pulse were injected into a chirped pulse amplifier (CPA) to reach 2.6 mJ per pulse. By controlling the CPA compressor, the output pulses were tuned from 32 – 56 fs. These pulses were used to generate supercontinuum spectra through nonlinear interaction with neon gas filled hollow-fiber by self-phase modulation. The generated output pulses from the fiber were compressed using chirped mirrors to perform dispersion compensation. The observed results reveal that, the output of the fiber can be tuned from about 12 to 94 THz by varying the chirping of input pulses at different pressure of the neon gas. Under optimum conditions of broadband-width at 94 THz, the generated pulses reached the shortest possible time duration of 4.86 fs. The observed results can give an opportunity to control the progression of strong-electric-field interactions on the ultrafast time scale and can be applied to regenerate attosecond pulses in the deep ultraviolet range..
Sub-5 fs, Ultra-broadband, Femtosecond laser, Self-phase modulation, Chirped pulse.
Submitted at: Jan. 22, 2016
Accepted at: April 5, 2016
WALID TAWFIK, Optimizing the optical throughput of a neon-filled hollow-core fiber for ultra-broadband sub-5 fs pulses, Journal of Optoelectronics and Advanced Materials Vol. 18, Iss. 3-4, pp. 213-219 (2016)
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