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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
A novel procedure to produce transform-limited optical pulses with high peak power using supercontinuum generation in an optical fiber has been developed. These pulses have been created using a mode-locked Ti:Sapphire oscillator to generate 18 fs pulses at 795.3 nm with energy of 4 nJ and bandwidth of 46 nm. A high power chirped pulse amplification was used to produce femtosecond pulses of 2.6 W at 32 fs for wavelength 800 nm. To achieve extreme pulse compression in the fewcycle regime, the 32 fs pulses have been injected through a hollow-fiber filled with neon gas to generate supercontinuum pulses then temporally compressor by multilayer-chirped mirrors. This arrangement enabled the generation of a five-octavewide supercontinuum ultrafast pulses over a wide frequency range from 500 THz to 333 THz. That broad bandwidth has allowed to produce transform limited pulses of 6.01 fs time duration and 120 GW peak power that exceeds the previously observed value of 80 GW for similar pulses. The observed results may give an opportunity to generate ultrashort pulses with extreme short optical wavelength using high harmonic generation that are needed for ultrafast spectroscopy in femtochemistry..
Transform-limited, Time-band-width-product, Ultrafast pulses, Supercontinuum generation.
Submitted at: Jan. 29, 2016
Accepted at: April 5, 2016
WALID TAWFIK, Creation of transform-limited 120 GW optical pulses using broadband supercontinuum generation in optical fiber, Journal of Optoelectronics and Advanced Materials Vol. 18, Iss. 3-4, pp. 201-206 (2016)
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