A Q-switched multi-wavelength Brillouin erbium fiber laser with a single-walled carbon nanotube saturable absorber

• Main Authors: Tan, S.J., Harun, Sulaiman Wadi, Ahmad, F., Nor, Roslan Md, Zulkepely, N.R., Ahmad, Harith
• Format: Article
• Published: IOP Publishing 2013
• Subjects: QC Physics
• Online Access: http://eprints.um.edu.my/7824/; https://doi.org/10.1088/1054-660X/23/5/055101

A Q-switched multi-wavelength Brillouin erbium fiber laser (MWBEFL) is demonstrated using a single-walled carbon nanotube-polyethylene oxide (SWCNT-PEO) saturable absorber (SA). The SA is fabricated by cutting off a small part of the developed SWCNT-PEO film and sandwiching it in between two FC/PC (fiber connector/physical contact) fiber connectors. Multi-wavelength combs with ten lasing lines and spacing of 0.158 nm are obtained by the use of 2 km long dispersion compensating fiber as the Brillouin gain medium and a four-port circulator to isolate and circulate the odd-order Stokes signals. Q-switched pulse trains with a repetition rate of 105.2 kHz and a pulse width of 0:996 μs are obtained in the proposed MWBEFL at a 1480 nm pump power of 120 mW and a Brillouin pump power of 5.4 dBm.