{"title":"Multi-Wavelength Q-Switched Erbium-Doped Fiber Laser with Photonic Crystal Fiber and Multi-Walled Carbon Nanotubes","authors":"Zian Cheak Tiu, Harith Ahmad, Sulaiman Wadi Harun","volume":94,"journal":"International Journal of Physical and Mathematical Sciences","pagesStart":1284,"pagesEnd":1288,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9999431","abstract":"
A simple multi-wavelength passively Q-switched
\r\nErbium-doped fiber laser (EDFL) is demonstrated using low cost
\r\nmulti-walled carbon nanotubes (MWCNTs) based saturable absorber
\r\n(SA), which is prepared using polyvinyl alcohol (PVA) as a host
\r\npolymer. The multi-wavelength operation is achieved based on
\r\nnonlinear polarization rotation (NPR) effect by incorporating 50 m
\r\nlong photonic crystal fiber (PCF) in the ring cavity. The EDFL
\r\nproduces a stable multi-wavelength comb spectrum for more than 14
\r\nlines with a fixed spacing of 0.48 nm. The laser also demonstrates a
\r\nstable pulse train with the repetition rate increases from 14.9 kHz to
\r\n25.4 kHz as the pump power increases from the threshold power of
\r\n69.0 mW to the maximum pump power of 133.8 mW. The minimum
\r\npulse width of 4.4 μs was obtained at the maximum pump power of
\r\n133.8 mW while the highest energy of 0.74 nJ was obtained at pump
\r\npower of 69.0 mW.<\/p>\r\n","references":"[1]\tS. Xiao, et al, \"Realization of multiwavelength label optical packet switching,\u201d Photonics Technology Letters, vol. 15, pp. 605\u2013607, 2003.\r\n[2]\tD. R. Chen, et al, \"Wavelength-spacing continuously tunable multi-wavelength SOA-fiber ring laser based on Mach-Zehnder interferometer,\u201d Optics & Laser Technology, vol. 40, pp. 278\u2013281, 2008.\r\n[3]\tS. Shahi, et al, \"Multi-wavelength generation using a bismuth-based EDF and Brillouin effect in a linear cavity configuration,\u201d Optics & Laser Technology, vol. 41, pp. 198\u2013201, 2009.\r\n[4]\tR. Parvizi, et al, \"Multi-wavelength bismuth0based erbium-doped fiber laser based on four-wave-mixing effect in photonic crystal fiber,\u201d Optics & Laser Technology, vol. 42, pp. 1250\u20131252, 2010.\r\n[5]\tN. S. Shahabuddin, et al, \"Multi-wavelength fiber laser based on nonlinear polarization rotation in semiconductor optical amplifier and photonic crystal fiber,\u201d Laser Physics, vol. 22, pp. 1257\u20131259, 2012.\r\n[6]\tF. Banhart, \"Irradiation effects in carbon nanostructures,\u201d Reports on Progress in Physics, vol. 62, pp. 1181, 1999\r\n[7]\tS. Yamashita, et al, \"Saturable absorbers incorporating carbon nanotubes directly synthesized onto substrates and fiber and their application to mode-locked fiber lasers,\u201d Optics Letters, vol. 29, pp. 1581\u20131583, 2004.\r\n[8] K. N Chen, Y. H. Lin, G. R. Lin, \"Single- and double-walled carbon nanotube based saturable absorbers for passive mode-locking of an erbium-doped fiber laser,\u201d Laser Physics, vol. 23, pp. 045105, 2013.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 94, 2014"}