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

• Main Authors: Syed Husin, Sharifah Aloyah, Muhammad, Farah Diyana, Norizan, Siti Fatimah, Abdul Latif, Amirah, Awang, Noor Azura, Zulkifli, Mohd Zamani
• Format: Article
• Language: English; English; English
• Published: Elsevier GmbH 2018
• Subjects: Q Science (General)
• Online Access: http://irep.iium.edu.my/66230/1/66230_Narrow%20core%20standard%20single%20mode_MYRA.pdf; http://irep.iium.edu.my/66230/2/66230_Narrow%20core%20standard%20single%20mode_SCOPUS.pdf; http://irep.iium.edu.my/66230/13/66230%20Narrow%20core%20standard%20single%20mode%20fiber%20for%20supercontinuum%20WOS.pdf; http://irep.iium.edu.my/66230/; https://www.sciencedirect.com/science/article/pii/S0030402618309926

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.