Q-SWITCHED THULIUM-DOPED FIBER LASER AT 2 MICRON REGION BY 802 NM PUMPING

2015 ◽  
Vol 74 (8) ◽  
Author(s):  
A. A. Latiff ◽  
M. T. Ahmad ◽  
Z. Zakaria ◽  
H. Ahmad ◽  
S. W. Harun
Keyword(s):  
Carbon Nanotubes ◽  
Pump Power ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Pulse Width ◽  
Laser Cavity ◽  
Pulse Generation ◽  
Q Switching ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

An 1892.4 nm ultrafast passive Q-switched fiber laser is demonstrated by using Thulium-doped fiber (TDF) in conjunction with a multi-walled carbon nanotubes (MWCNTs) as a saturable absorber (SA). The MWCNTs film is sandwiched between two FC/PC fiber connectors and integrated into the laser cavity with 802 nm pump for Q-switching pulse generation. The pulse repetition rate can be tuned from 3.8 to 4.6 kHz while the corresponding pulse width reduces from 22.1 to 18.4 μs as the pump power is increased from 187.3 to 194.2 mW. A higher performance Q-switched Thulium-doped fiber laser (TDFL) is expected to be achieved with the optimization of the MWCNT-SA saturable absorber and laser cavity.

scholarly journals Dual-wavelength passively Q-switched Erbium-doped fiber laser with MWCNTs slurry as saturable absorber

2016 ◽  
Vol 8 (4) ◽  
pp. 98 ◽  
Author(s):  
Siti Nur Fatin Zuikafly ◽  
Fauzan Ahmad ◽  
Mohd Haniff Ibrahim ◽  
Anas Abdul Latiff ◽  
Sulaiman Wadi Harun
Keyword(s):  
Carbon Nanotubes ◽  
Pump Power ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Dual Wavelength ◽  
Erbium Doped ◽  
Laser Optics ◽  
Multi Walled Carbon Nanotubes ◽  
Graphene Saturable Absorber ◽  
Walled Carbon Nanotubes

In this work, a compact, stable dual-wavelength Q-switched laser with a multi-walled carbon nanotubes (MWCNTs) slurry as saturable absorber (SA) which is independent of any host polymer has been demonstrated. The MWCNTs slurry is fabricated and the peak shift is investigated using Raman spectroscopy.The passively Q-switched erbium-doped fiber laser (EDFL) oscillated simultaneously at 1532.32 nm and 1556.97 nm with 24.67 nm peak separation, at threshold and maximum input power of 26mW and 74mW respectively.By increasing the input pump power from 36 mW to 74 mW, the pulse train repetition rate increases from 25 kHz to 78 kHz, while the pulse width is reduced from 17.84 us to 5.24 ?s. The generated pulse produced maximum pulse energy and maximum peak power of 11.97 nJ and 2.05 mW, respectively at maximum input pump power. The recorded signal to noise ratio is about 62 dB and shows that the proposed MWCNTs slurry based SAis able to generate dual wavelength Q-switched pulse laser with high stability pulse. Full Text: PDF ReferencesL.Liu, Z. Zheng, X. Zhao,S. Sun, Y. Bian, Y. Su, J. Liu, and J. Zhu, "Dual-wavelength passively Q-switched Erbium doped fiber laser based on an SWNT saturable absorber", Optics Communications 294, 267 (2013). CrossRef Z. Luo, M. Zhou, J. Weng, G. Huang, H. Xu, C. Ye, and Z. Cai, "Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser", Optics Letters 35, 3709 (2010). CrossRef F. Lou, R. Zhao, J. He, Z. Jia, X. Su, Z. Wang, J. Hou, and B. Zhang, "Nanosecond-pulsed, dual-wavelength, passively Q-switched ytterbium-doped bulk laser based on few-layer MoS2 saturable absorber", Photon. Res. 3, A25 (2015). CrossRef F. A. A. Rashid et al., "Using a black phosphorus saturable absorber to generate dual wavelengths in a Q-switched ytterbium-doped fiber laser", Laser Phys. Lett. 13, 1 (2016). CrossRef J. Sotor, G. Sobon, I. Pasternak, K. Krzempek, G. Dudzik, A. Krajewska, W. Strupinski, and K. M. Abramski, "Dual-wavelength fiber mode-locked laser based on graphene saturable absorber", Proc. of SPIE 8961, 89612A (2014). CrossRef S. Alwarappan, and A. Kumar, Graphene-Based Nanomaterials (Boca Rota, CRC Press 2014).N. Taib, N. Bidin, H. Haris, N. N. Adnan, M. Ahmad, and S. W. Harun, "Multi-walled carbon nanotubes saturable absorber in Q-switching flashlamp pumped Nd:YAG laser", Optics & Laser Technology 79, 193 (2016). CrossRef M. Ahmad, A. Latiff, Z. Zakaria, and S. Harun, "Q-Switched Ultrafast TDFL Using MWCNTs-SA at 2 ?m Region", International Journal of Computer and Communication Engneering 3, 446 (2014). CrossRef H. Ahmad, K. Z. Hamdan, F. D. Muhammad, S. W. Harun, and M. Z. Zulkifli, "Switchable dual-wavelength CNT-based Q-switched using arrayed waveguide gratings (AWG)", Applied Physics B 118, 269 (2015). CrossRef J. M. Dudley and J. R. Taylor, Supercontinuum Generation in Optical Fibres (New York, Cambridge University Press 2010). CrossRef H. Ahmad, M. A. M. Salim, M. R. K. Soltanian, S. R. Azzuhri, and S. W. Harun, "Passively dual-wavelength Q-switched ytterbium doped fiber laser using Selenium Bismuth as saturable absorber", Journal of Modern Optics 62, 1550 (2015). CrossRef H. Chu et al., "Dual-Wavelength Passively Q-Switched Nd,Mg:LiTaO3 Laser With a Monolayer Graphene as Saturable Absorber", IEEE Journal of Selected Topics in Quantum Electronics 21, 1600705 (2015). CrossRef Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, "Switchable Dual-Wavelength Synchronously Q-Switched Erbium-Doped Fiber Laser Based on Graphene Saturable Absorber", IEEE Photonics Journal 4, 869 (2012). CrossRef J. H. Liu et al., "Passively Q-switched dual-wavelength Yb:LSO laser based on tungsten disulphide saturable absorber", Chin. Phys. B 25, 034207 (2016). CrossRef Z. C. Tiu et al, "Multi-wavelength Q-switched Erbium-doped fiber laser with photonic crystal fiber and multi-walled carbon nanotubes", Journal of Modern Optics 61, 1133 (2014). CrossRef

scholarly journals Bi2Te3 Topological Insulator for Domain-Wall Dark Pulse Generation from Thulium-Doped Fiber Laser

Crystals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 337 ◽  
Author(s):  
Joonhoi Koo ◽  
Nandam Ashok ◽  
Dong Hwan Kim ◽  
Woojin Shin
Keyword(s):  
Pump Power ◽  
Domain Wall ◽  
Fiber Laser ◽  
Topological Insulator ◽  
Repetition Rate ◽  
Pulse Width ◽  
Laser Cavity ◽  
Pulse Generation ◽  
Distilled Water ◽  
Dark Pulse

We have experimentally demonstrated domain-wall (DW) dark pulses from a thulium-doped fiber laser incorporating a topological insulator saturable absorber (SA). The bulk-structured Bi2Te3 was used as the SA, which was constructed on a fiber ferrule platform through the deposition of the Bi2Te3 mixed with distilled water. The DW dark pulses were generated from the thulium-doped fiber laser cavity with a dual wavelength at 1956 nm and 1958 nm. The dark pulse width and the repetition rate were measured as ~10.3 ns and ~20.7 MHz over the pump power of ~80 mW, respectively. To the best of our knowledge, this work is the first demonstrated generation of the DW dark pulse from a thulium-doped fiber laser using nanomaterial-based SA.

Q-switched ytterbium doped fiber laser using multi-walled carbon nanotubes saturable absorber

2014 ◽  
Vol 12 (3) ◽  
pp. 031403-31406 ◽  
Author(s):  
N. Kasim N. Kasim ◽  
A. H. H. Al-Masoodi A. H. H. Al-Masoodi ◽  
F. Ahmad F. Ahmad ◽  
Y. Munajat Y. Munajat ◽  
H. Ahmad H. Ahmad ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

SOLITON MODE-LOCKED GENERATION BASED ON ERBIUM-DOPED FIBER LASER EMBEDDED WITH SINGLE-WALLED CARBON NANOTUBES AS SATURABLE ABSORBER

2016 ◽  
Vol 78 (3) ◽  
Author(s):  
Ahmad Razif Muhammad ◽  
Sulaiman Wadi Harun ◽  
Hazlihan Haris ◽  
Hamzah Arof
Keyword(s):  
Carbon Nanotubes ◽  
Pump Power ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Single Walled Carbon Nanotubes ◽  
Threshold Value ◽  
Single Walled Carbon ◽  
Soliton Pulse ◽  
Erbium Doped ◽  
Walled Carbon Nanotubes

Soliton mode-locked Erbium-doped fiber laser (EDFL) using single walled carbon nanotubes (SWCNTs) was experimentally demonstrated. In this work, SWCNTs was prepared by embedding into polyvinyl alcohol (PVA) as a saturable absorber. The laser generates a soliton pulse, which operates at 1570 nm region without any additional spectral filter as a 980 nm pump power is increased above the threshold value of 60 mW.  The output solitons have a pulse duration of 0.7 ps with a repetition rate of 18.98 MHz. At pump power of 130 mW, the pulse energy and peak power are approximately 0.032 nJ and 43 W.

Multi-walled carbon nanotubes saturable absorber in Q-switching flashlamp pumped Nd:YAG laser

2016 ◽  
Vol 79 ◽  
pp. 193-197 ◽  
Author(s):  
Nur Athirah Mohd Taib ◽  
Noriah Bidin ◽  
Hazlihan Haris ◽  
Nurul Nadia Adnan ◽  
M. Fakaruddin Sidi Ahmad ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Saturable Absorber ◽  
Nd:Yag Laser ◽  
Q Switching ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Graphene slurry based passive Q-switcher in erbium doped fiber laser

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Siti Nur Fatin Zuikafly ◽  
Nor Farhah Razak ◽  
Rizuan Mohd Rosnan ◽  
Sulaiman Wadi Harun ◽  
Fauzan Ahmad
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Pulse Width ◽  
Peak Power ◽  
Signal To Noise Ratio ◽  
Pulsed Laser ◽  
Laser Cavity ◽  
Signal To Noise ◽  
Maximum Pulse Energy ◽  
Erbium Doped

In this work, a Graphene slurry based passive Q-switcher fabricated from Graphene-Polylactic acid (PLA) filament which is used for 3D printing. To produce the Graphene slurry, the diameter of the filament was reduced and Tetrahydrofuran (THF) was used to dissolve the PLA. The Graphene-THF suspension was drop cast to the end of a fiber ferrule and the THF then evaporated to develop Graphene slurry based SA which is integrated in fiber laser cavity. At threshold input pump power of 30.45 mW, a Q-switched Erbium-doped fiber laser (EDFL) can be observed with the wavelength centered at 1531.01 nm and this remained stable up to a pump power of 179.5 mW. As the pump power was increased gradually, an increase in the repetition rates was recorded from 42 kHz to 125 kHz, while the pulse width was reduced to 2.58 μs from 6.74 μs. The Q-switched laser yielded a maximum pulse energy and peak power of 11.68 nJ and 4.16 mW, respectively. The proposed Graphene slurry based saturable absorber also produced a signal-to-noise ratio of 44 dB indicating a stable Q-switched pulsed laser.

Pure gold saturable absorber for generating Q-switching pulses at 2 µm in Thulium-doped fiber laser cavity

2019 ◽  
Vol 50 ◽  
pp. 23-30 ◽  
Author(s):  
A.R. Muhammad ◽  
R. Zakaria ◽  
M.T. Ahmad ◽  
P. Wang ◽  
S.W. Harun
Keyword(s):  
Fiber Laser ◽  
Saturable Absorber ◽  
Laser Cavity ◽  
Pure Gold ◽  
Q Switching
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