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 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 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.

Graphene based Q-switched tunable S-band fiber laser incorporating arrayed waveguide gratings (AWG)

2014 ◽  
Vol 23 (01) ◽  
pp. 1450004 ◽  
Author(s):  
F. D. Muhammad ◽  
M. Z. Zulkifli ◽  
H. Ahmad
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Pulse Duration ◽  
Repetition Rate ◽  
Tunable Laser ◽  
Laser Cavity ◽  
Laser Source ◽  
Arrayed Waveguide Gratings ◽  
Waveguide Gratings ◽  
Arrayed Waveguide

We present in this paper, the result of successful fabrication of a novel graphene-based Q-switched fiber laser in the S-band region using an arrayed waveguide gratings (AWGs). The S-band lasing is realized by employing a depressed-cladding erbium doped fiber (DC-EDF), as the gain medium. A new ferrule-to-ferrule and stepwise optical extraction method is introduced and employed for depositing the thin graphene layer within the fiber laser cavity as the saturable absorber, while a tunable laser source (TLS) is used for depositing graphene onto the fiber ferrule. A demonstration of performance characteristics of this device is presented showing a Q-switched threshold of 65.29 mW and a range of repetition rate from 73.6 kHz to 331.1 kHz, with a linear increment. Minimum pulse duration of 1.218 μs is obtained at a pump power of 100.44 mW. Additional measurements are performed on the characteristics of the output power, pulse duration, pulse repetition rate, pulse energy, and peak power with respect to the pump power.

Domain-wall dark pulse generation in fiber laser incorporating MoS2

2016 ◽  
Vol 122 (4) ◽  
Author(s):  
Harith Ahmad ◽  
Zian Cheak Tiu ◽  
Arman Zarei ◽  
Muneswaran Suthaskumar ◽  
Muhammad Aizi Mat Salim ◽  
...  
Keyword(s):  
Domain Wall ◽  
Fiber Laser ◽  
Pulse Generation ◽  
Dark Pulse

Q-switched multi-wavelength Brillouin erbium fiber laser

2014 ◽  
Vol 23 (01) ◽  
pp. 1450010 ◽  
Author(s):  
N. M. Ali ◽  
C. L. Anyi ◽  
H. Arof ◽  
S. W. Harun
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Repetition Rate ◽  
Pulse Width ◽  
Relaxation Oscillation ◽  
Pulse Trains ◽  
Stokes Lines ◽  
Multi Wavelength ◽  
Even Order ◽  
Switching Characteristics

In this paper, a demonstration of performance of a multi-wavelength Brillouin Erbium Fiber Laser (BEFL) with double Brillouin spacing (DBS) output comb and Q-switching characteristics featuring a figure-of-eight configuration is presented. It utilizes a four-port circulator to discriminate the odd and even order Stokes lines which allows, using 7 km long dispersion shifted fiber (DSF), the generation of a spectrum with DBS, multi-wavelength comb of nine lasing lines and a 0.16 nm spacing. The Q-switched pulse trains are obtained from the proposed BEFL configured with the DSF and pumped at 1480 nm and power ranging from 20 mW to 40 mW based on relaxation oscillation technique. It has the highest repetition rate of 609 kHz and the smallest pulse width of 0.73 μs at the pump power of 40 mW. The highest pulse energy of 6.15 nJ is obtained at pump power of 30 mW. The repetition rate and pulse width of the BEFL are reduced by replacing the DSF with 10 km long nonzero dispersion shifted fiber (NZ-DSF).

scholarly journals Passively Q-switched Yb-doped fiber laser based on Ag nanoplates saturable absorber

2020 ◽  
Vol 243 ◽  
pp. 14004
Author(s):  
Pan Wang ◽  
Vittorio Scardaci
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Repetition Rate ◽  
Ultrafast Lasers ◽  
Low Cost ◽  
Single Pulse ◽  
Pulse Generation ◽  
Promising Candidate ◽  
Average Output

We experimentally investigated Ag nanoplates as saturable absorber for Q-switched pulse generation in an Yb-doped fiber laser. The pulse train repetition rate increases with the increase of the pump power. At the maximum pump power of 600 mW, the maximum repetition rate and average output power are 184.8 kHz and 10.77 mW, respectively, corresponding to single pulse energy of 58.3 nJ. To the best of our knowledge, it is the first demonstration of the passively Q-switched fiber laser utilizing the material of Ag nanoparticles at the wavelength of 1-μm. Our investigations demonstrate the flexibility of our solution-processed Ag nanoplates-based saturable absorber, making it a promising candidate for a variety of stable and low-cost ultrafast lasers.

scholarly journals Graphene Oxide Film as Passive Q-switcher in Erbium-doped Fiber Laser Cavity

2017 ◽  
Vol 9 (3) ◽  
pp. 100 ◽  
Author(s):  
Fauziah Che Mat ◽  
Moh Yasin ◽  
Anas Abdul Latiff ◽  
Sulaiman Wadi Harun
Keyword(s):  
Graphene Oxide ◽  
Pump Power ◽  
Oxide Film ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Repetition Rate ◽  
Fiber Lasers ◽  
Pulse Generation ◽  
High Speed Photography ◽  
Erbium Doped

All-fiber passively Q-switched fiber lasers have been demonstrated by using graphene oxide (GO) Q-switcher for possible applications in telecommunication, laser processing, fiber sensing and medical community. The GO material was obtained through a modified Hummers method from expanded acid washed graphite flakes and it was embedded into a polyvinyl alcohol (PVA) film to form a saturable absorber (SA) device. The Q-switched pulse operates at 1563.3 nm with a repetition rate that can be tuned from 44.33 kHz to 61.77 kHz as the pump power changes from 39 mW to 96 mW. The highest repetition rate of 61.77 kHz is achieved at a pump power of 96 mW and it is observed that the Q-switched pulse produced maximum pulse energy of 0.054 nJ and pulse width of 5.57 ?s at 96 mW pump power. Full Text: PDF ReferencesJ. Zayhowski and C. Dill, "Coupled-cavity electro-optically Q-switched Nd:YVO4 microchip lasers", Optics letters 20, 716 (1995). CrossRef C.-x. Gao, W. Zhao, Y.-s. Wang, S.-l. Zhu, G.-f. Chen, and Y.-g. Wang, "Passive Q-switched fiber laser with SESAM in ytterbium-doped double-clad fiber", 27th International congress on High-Speed Photography and Photonics, 62794G (2007). CrossRef M. Ahmed, N. Ali, Z. Salleh, A. Rahman, S. Harun, M. Manaf, "Q-switched erbium doped fiber laser based on single and multiple walled carbon nanotubes embedded in polyethylene oxide film as saturable absorber", Optics & Laser Technology 65, 25 (2015). CrossRef S. Harun, M. Ismail, F. Ahmad, M. Ismail, R. Nor, N. Zulkepely, et al., "A Q-switched erbium-doped fiber laser with a carbon nanotube based saturable absorber", Chinese Physics Letters 29, 114202 (2012). CrossRef A. Martinez and Z. Sun, "Nanotube and graphene saturable absorbers for fibre lasers", Nat Photon 7, 842 (2013). CrossRef J. Boguslawski, J. Sotor, G. Sobon, R. Kozinski, K. Librant, M. Aksienionek, et al., "Graphene oxide paper as a saturable absorber for Er- and Tm-doped fiber lasers", Photonics Research 3, 119 (2015). CrossRef H. Ahmad, F. D. Muhammad, M. Z. Zulkifli, and S. W. Harun, "Q-switched pulse generation from an all-f iber distributed Bragg reflector laser using graphene as saturable absorber", Chinese Optics Letters 11, 071401 (2013). CrossRef

scholarly journals Hafnium Bismuth Erbium Co-Doped Fiber Based Dark Pulses Generation With Black Phosphorus As Saturable Absorber

2021 ◽  
Vol 2075 (1) ◽  
pp. 012018
Author(s):  
A Ahmad ◽  
M F A Rahman ◽  
M A M Johari ◽  
A A Latiff ◽  
M H Jali ◽  
...  
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Maximum Output Power ◽  
Mode Locking ◽  
Pulse Generation ◽  
Black Phosphorus ◽  
Maximum Output ◽  
Oscilloscope Trace ◽  
Dark Pulse

Abstract A dark pulse generation is demonstrated in a fiber laser configured with a 20 cm long HBEDF and multilayer Black Phosphorus as a gain medium and saturable absorber, respectively. Dark pulses fiber laser at 1.5 µm region was obtained when the pump power exceeds the threshold of 147 mW. Meanwhile, the spectrum of the dark pulse is centred at 1556.40 nm, with the 3 dB bandwidth of 0.12 nm and the separation between adjacent pulses is 1145 ns, corresponding to the cavity length of 211 m. The pulse width was measured to be around 320 ns. The radio-frequency spectrum of the dark pulse, which was measured within the 20 MHz range. More than 17 harmonics were observed within this range, which indicates the mode-locking operation of the laser. The fundamental frequency was obtained at 1.1 MHz, which agreed with the oscilloscope trace. Furthermore, it shows a signal to noise ratio of about 36.58 dB, which indicates good stability. The maximum output power of 0.78 mW and pulse energy of 0.78 nJ were obtained at 187 mW pump power.

Actively Q-Switched Fiber Laser with Narrow Linewidth, Narrow Pulse Width, and High Repetition Rate

2020 ◽  
Vol 47 (1) ◽  
pp. 0101002
Author(s):  
张骥 Zhang Ji ◽  
张东 Zhang Dong ◽  
刘昊炜 Liu Haowei ◽  
姚波 Yao Bo ◽  
毛庆和 Mao Qinghe
Keyword(s):  
Fiber Laser ◽  
Repetition Rate ◽  
Pulse Width ◽  
High Repetition Rate ◽  
Narrow Linewidth ◽  
High Repetition
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