| 1 | A Q-Switched Erbium-Doped Fiber Laser with a Carbon Nanotube Based Saturable Absorber显示文摘We demonstrate a simple,compact and low cost Q-switched erbium-doped fiber laser(EDFL)using single-wall carbon nanotubes(CNTs)as a saturable absorber for possible applications in metrology,sensing,and medical diagnostics.The EDFL operates at around 1560 nm with repetition rates of 16.1 kHz and 6.4 kHz with saturable absorbers SA1 and SA2 at a pump power of 120 mW.The absorbers are constructed by optically driven deposition and normal deposition techniques.It is observed that the optical deposition method produces a Q-switched EDFL with a lower threshold of 70 mW and better Q-switching performance compared to that of the normal deposition method.The EDFL also has pulse energy of 90.3 nJ and pulse width of 11.6μs at 120 mW pump power. | S.W.Harun M.A.Ismail F.Ahmad M.F.Ismail R.M.Nor N.R.Zulkepely H.Ahmad | 2012 | Chinese Physics Letters2012，29，11： | 0 |
| 2 | A Passively Mode-Locked Erbium-Doped Fiber Laser Based on a Single-Wall Carbon Nanotube Polymer显示文摘We demonstrate a simple,compact and low-cost mode-locked erbium-doped fiber laser(EDFL)using a single-wall carbon nanotube(SWCNT)poly-ethylene oxide(PEO)composite as a passive saturable absorber(SA).The composite with an SWCNT concentration of 18wt%is prepared by mixing the SWCNT homogeneous solution with a diluted PEO polymer solution.A droplet of the polymer composite is applied on the fiber ferrule end,which is then mated to another clean ferrule connector to construct an SA.The SA is then integrated into the laser system to self-start stable mode locking at 1557 nm without employing a polarization controller.The EDFL generates a stable soliton pulse train with a duration of 0.81 ps,repetition rate of 44 MHz and average output power of 92.4μW at a 980 nm pump power of 26.8 mW.The soliton laser starts to lase at a pump power threshold of 14.6 mW. | F.Ahmad S.W.Harun R.M.Nor N.R.Zulkepely H.Ahmad P.Shum | 2013 | Chinese Physics Letters2013，30，5： | 0 |
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