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| 1 | Molybdenum Disulphide Tape Saturable Absorber for Mode-Locked Double-Clad Ytterbium-Doped All-Fiber Laser Generation显示文摘We demonstrate the generation of passive mode-locked double-clad ytterbium-doped fiber laser operating in a1-micron region.We prepare the saturable absorber from commercial crystal of molybdenum disulphide(MoS_2).Without chemical procedure,the MoS_2 is mechanically exfoliated by using a clear scotch tape.A few layers of M0S2 flakes are obtained on the tape.Then,a piece of 1 × 1 mm tape containing MoS_2 thin Bakes is inserted between two fiber ferruJes and is integrated in the ring cavity.Stable mode-locking operation is attained at1090 nm with a repetition rate of 13.2MHz.Our mode-locked laser has a maximum output power of 20 mW with1.48 nJ pulse energy.These results validate that the M0S2 has a broad operating wavelength which covers the1-micron region,and it is also able to work in a high-power cavity. | M.F.M.Rusdi A.A.Latiff E.Hanafi M.B.H.Mahyuddin H.Shamsudin K.Dimyati S.W.Harun | 2016 | Chinese Physics Letters2016，33，11： | 0 |
| 2 | Self-Starting Harmonic Mode-Locked Thulium-Doped Fiber Laser with Carbon Nanotubes Saturable Absorber显示文摘We report a ring cavity passively harmonic mode-locked thulium-doped fiber laser(TDFL)using a newly devel-oped single-wall carbon nanotube-based saturable absorber.The TDFL generates the 25 th harmonic mode-locked stretched pulse train with a high repetition rate of 213MHz and a pulse duration of 710fs.The laser operates at 1901.6nm with an average power of 1.89mW,which corresponds to the pulse energy of 0.008nJ,at 1552nm pump power of 719mW.The peak-to-background ratio is measured to be 60dB,which indicates the stability of the laser. | S.W.Harun N.Saidin D.I.M.Zen N.M.Ali H.Ahmad F.Ahmad K.Dimyati | 2013 | Chinese Physics Letters2013，30，9： | 0 |
| 3 | Self-starting harmonic mode-locked Tm-Bi co-doped germanate f iber laser with carbon nanotube-based saturable absorber显示文摘We report a ring cavity passively harmonic mode-locked fiber laser using a newly developed thuliumbismuth co-doped fiber(TBF) as a gain medium in conjunction with a carbon nanotube(CNT)-based saturable absorber.The TBF laser generates a third harmonic mode-locked soliton pulse train with a high repetition rate of 50 MHz and a pulse duration of 1.86 ps.The laser operates at 1 901.6 nm with an average power of 6.6 mW,corresponding to a pulse energy of 0.132 nJ,at a 1 552 nm pump power of 723.3 mW. | N.Saidin D.I.M.Zen S.S.A.Damanhuri S.W.Harun H.Ahmad F.Ahmad K.Dimyati A.Halder M.C.Paul M.Pal S.K.Bhadra | 2013 | Chinese Optics Letters2013，11，6： | 0 |
| 4 | Holmium Oxide Film as a Saturable Absorber for 2μm Q-Switched Fiber Laser显示文摘This work reports on the use of the holmium oxide(Ho_2 O_3) polymer film as a saturable absorber(SA) for generating stable Q-switching pulses operating in a 2-μm region in a thulium-doped fiber laser cavity. The SA is prepared by diluting a commercial Ho_3 O_2 powder and then mixing it with polyvinyl alcohol(PVA) solution to form a Ho_2 O_3-PVA film. A tiny part of the film about 1 mm×1 mm in size is sandwiched between two fiber ferrules with the help of index matching gel. When incorporated in a laser cavity driven by a 1552-nm pump,stable Q-switching pulses are observed at 1955 nm within the pump power range of 363-491 mW. As the pump power increases within this range, the repetition rate rises from 26 kHz to 39 kHz, as the pulse width drops from4.22μs to 2.57μs. The laser operates with a signal-to-noise ratio of 47 dB, and the maximum output power and the pulse energy obtained are 2.67 mW and 69 nJ, respectively. Our results successfully demonstrate that the Ho_2 O_3 film can be used as a passive SA to generate a 2-μm pulse laser. | M.F.A.Rahman M.F.M.Rusdi M.Q.Lokman M.B.H.Mahyuddin A.A.Latiff A.H.A.Rosol K.Dimyati S.W.Harun | 2017 | Chinese Physics Letters2017，34，5： | 0 |
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