Narrow core standard single mode fiber for supercontinuum generation from graphene-based mode-locked pulses

• Main Authors: Syed Husin, Syarifah Aloyah, Muhammad, Farah Diana, Norizan, Siti Fatimah, Abd.Latif, Amirah, Awang, Noor Azura, Zulkifli, Mohd Zamani
• Format: Article
• Language: English
• Published: Elsevier 2018
• Online Access: http://psasir.upm.edu.my/id/eprint/75059/1/Narrow%20core%20standard%20single%20mode%20fiber%20for%20supercontinuum%20generation%20from%20graphenebased%20mode-locked%20pulses.pdf; http://psasir.upm.edu.my/id/eprint/75059/
• Institution: Universiti Putra Malaysia

In this work, a supercontinuum (SC) source is proposed and demonstrated using a highly-doped, 2 m long zirconia-erbium doped fiber (Zr-EDF) with a dopant concentration of 3800 ppm/wt and a narrow core 100 m long single-mode-fiber (SMF). A graphene based saturable absorber (SA) is used as a passive mode-locker, generating pulses with an average output power, pulse energy and peak power of ∼0.9 mW, ∼69.8 pJ and ∼83 W respectively and a repetition rate of 12.9 MHz. This is then amplified using a 140 mW amplifier, giving an output power, pulse energy and peak power of ∼75.0 mW, 5.8 nJ and ∼6.76 kW respectively and injected into a 100 m long SMF, to generate an SC output which spans from 1450 to more than 1700 nm, with a pulse width at its full-width-at-half-maximum (FWHM) of 120 fs, 7 times lower than the 840 fs FWHM width of the pulses from the fiber laser. The narrow core SMF performs comparably to longer lengths of standard SMF-28 fibers.