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.

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.

Optimization of L-Band Ring Cavity Brillouin Erbium Fiber Laser

2015 ◽  
Vol 815 ◽  
pp. 380-383
Author(s):  
N. Roshidah Yusof ◽  
N.A.M. Ahmad Hambali ◽  
R. Othman ◽  
W. Mokhzani ◽  
M.H.A. Wahid
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Output Power ◽  
Ring Cavity ◽  
Wavelength Region ◽  
Tunable Laser ◽  
Gain Medium ◽  
Laser Source ◽  
Source Power ◽  
L Band

In this paper, the performance of ring cavity Brillouin Erbium fiber laser (BEFL) within L-band wavelength region are discussed. Introducing Erbium doped fiber as a secondary gain medium into conventional Brillouin fiber laser configuration is the best alternative to maximize the Brillouin Stokes power (output power) and to sustain the gain flatness. Few parameters comprising length of fiber, pump power and tunable laser source power are varied to obtain the optimum output power. From the simulation process, a maximum Brillouin Stokes power of 54.75 dBm is produced as 16 dBm Brillouin pump power and 1480 nm pump laser are injected to the configuration.

3D Micromolding of Arrayed Waveguide Gratings on Upconversion Luminescent Layers for Flexible Transparent Displays without Mirrors, Electrodes, and Electric Circuits

2015 ◽  
Vol 25 (28) ◽  
pp. 4390-4396 ◽  
Author(s):  
Satoshi Watanabe ◽  
Takeo Asanuma ◽  
Takafumi Sasahara ◽  
Hiroshi Hyodo ◽  
Mutsuyoshi Matsumoto ◽  
...  
Keyword(s):  
Arrayed Waveguide Gratings ◽  
Electric Circuits ◽  
Waveguide Gratings ◽  
Arrayed Waveguide

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.

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