TY - JOUR N2 - A simple and robust method to generate a dual-wavelength mode-locked laser using a tunable Mach-Zehnder filter (TMZF) and a single-wall carbon nanotube (SWCNT) based saturable absorber (SA) is proposed and demonstrated. The proposed laser uses a thulium-doped fiber for lasing in the two-micron region and exploits the interferometric spectrum of the TMZF to produce dual peaks with nearly equal magnitude. SWCNT based SA enables mode-locking at a threshold value of 150.4 mW with distinct dual-wavelength peaks at 1919.2 nm and 1963.7 nm. The peaks have a calculated pulse width of 1.8 ps and 1.6 ps, respectively with a repetition rate of 9.1 MHz with a relatively high optical-signal-to-noise ratio value of 59.1 dB. The output is also observed to remain unchanged over time, indicating high stability. The proposed laser has a promising application, particularly in ultrafast gas molecular spectroscopy and sensing. L1 - http://www.journals.pan.pl/Content/115331/PDF/main.pdf L2 - http://www.journals.pan.pl/Content/115331 PY - 2018 IS - No 4 EP - 316 KW - Dual-wavelength KW - Mode-locking KW - Thulium-doped fiber laser KW - Mach-Zehnder filter A1 - Sharbirin, A.S. A1 - Samion, M.Z. A1 - Ismail, M.F. A1 - Ahmad, H. PB - Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology VL - vol. 26 DA - 22.11.2018 T1 - Ultrafast mode-locked dual-wavelength thulium-doped fiber laser using a Mach-Zehnder interferometric filter SP - 312 UR - http://www.journals.pan.pl/dlibra/publication/edition/115331 T2 - Opto-Electronics Review ER -