Passively Q-switched erbium-doped fiber laser with mechanical exfoliation of 8-HQCDCL2H2O as saturable absorber

Najm, Mustafa Mohammed; Al-Hiti, Ahmed Shakir; Nizamani, Bilal; Arof, Hamzah; Zhang, Pei; Yasin, Moh.; Harun, Sulaiman Wadi

doi:10.1016/j.ijleo.2021.167073

Cited by 15 publications

(5 citation statements)

References 34 publications

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“…The PC was excluded from the THDFL cavity during the generation of Q-switched pulses since the polarization played a negligible role and the insertion of the PC would introduce some unwanted loss. [9,82] The various items of equipment used 064205-5 for measurement of the laser output comprised a 500 MHz oscilloscope (Yokogawa DLM2054), a 1200 nm-2400 nm wavelength range OSA (Yokogawa AQ6375), a radio-frequency spectrum analyzer (RFSA; Anritsu MS2683A) an optical power meter (Thorlabs S148C) and an autocorrelator (APE PulseCheck150). Both the RFSA and oscilloscope were connected via a 2 µm InGaAs fast photodetector (Newport 818-BB-51) for optical to electrical conversion at the output.…”

Section: Methodsmentioning

confidence: 99%

Antimonene-based saturable absorber for a soliton mode-locked and Q-switched fiber laser in the 2 μm wavelength region

et al. 2023

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In this work, we have demonstrated antimonene as a saturable absorber to generate ultrafast mode-locked and Q-switched laser at a 2-micron wavelength region. The two antimonene-based SAs were prepared and inserted separately in a thulium-holmium doped fiber laser (THDFL) to produce the pulsed lasers. Antimonene was coated onto the tapered fiber to generate soliton mode-locked pulses and in thin-film form for the generation of Q-switched pulses. The modelocking was stable within the pump power of 267 to 511 mW, and the laser operated at the center wavelength of 1897.4 nm. The mode-locked laser had a pulse width of 1.3 ps and a repetition rate of 12.6 MHz, with a signal-to-noise ratio (SNR) of 64 dB. The Q-switched laser operation was stable at the wavelength of 1890.1 nm within the pump power of 312 to 381 mW. With the increase in pump power from 312 mW to 381 mW, the repetition rate increased to a maximum of 56.63 kHz and the pulse width decreased to a minimum value of 2.85 μs. A wide range tunability of Q-switched laser was also realized within the wavelength of 1882 to 1936 nm.

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Section: Methodsmentioning

confidence: 99%

Antimonene-based saturable absorber for a soliton mode-locked and Q-switched fiber laser in the 2 μm wavelength region

et al. 2023

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“…These changes impact the mode-locked pulse parameters such as pulse durations, pulse energies, and pulse peak powers [17]. Several pulsed lasers, including Q-switched, soliton mode-locked, and dark pulse mode-locked lasers, can be achieved with the real SAs [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Wavelength-tunable mode-locked laser using zinc phosphate as a saturable absorber at 1.9 μm

et al. 2023

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Metal phosphates have emerged as low-cost inorganic materials suitable for high-performance energy storage and conversion devices. The photoluminescence properties of metal phosphates are now being explored for their optoelectronic applications. Among them, zinc phosphate is the composition of metal zinc and phosphoric acid. In this work, we have demonstrated the synthesis of zinc phosphate by the solvothermal method and its potential as a saturable absorber (SA) to generate a tunable mode-locked laser at 1.9 µm. Zinc phosphate was coated over arc-shaped fiber and incorporated in a thulium-holmium doped fiber laser (THDFL) to achieve the mode-locking. Soliton mode-locked pulses were achieved at a center wavelength of 1893 nm with the pulse duration, repetition rate, and signal-to-noise ratio (SNR) of 1.12 ps, 12 MHz, and 68 dB, respectively. The center wavelength of the mode-locked laser was tunable from 1893 to 1898.4 nm, and the pulse duration ranged between 1.12 to 1.4 ps. To the authors' knowledge, this is the first demonstration of a wavelength-tunable mode-locked laser using zinc phosphate as a SA at 1.9 µm.

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“…However, the applications of active approaches are limited because it needs a sizable and costly external modulator to induce and restore a high Q-factor to generate pulses [7]. Saturable absorber (SA) material [8][9][10][11], semiconductor saturable absorber mirror (SESAM) [12][13][14], and nonlinear polarization rotation (NPR) [15,16] are passive components that passive techniques merely add to the ring cavity to generate pulses in the laser cavity. SESAM is the most often used SA in solid-state lasers for producing passive Q-switched fiber lasers by adjusting factors like recovery time, saturation energy, and absorption.…”

Section: Introductionmentioning

confidence: 99%

Influence of thickness on tunability performance of plasma sputtered indium tin oxide as Q-switcher

Zalkepali¹,

Mahmud²,

Awang³

et al. 2023

Laser Phys.

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We successfully investigated the influence of thickness on the tunability performance of plasma-sputtered indium tin oxide (ITO) as a Q-switcher. ITO is coated using direct current magnetron sputtering techniques with sputtering times of 150 s, 250 s, and 350 s to generate excellent quality ITO. Filmetrics measures the thickness, yielding 17.80 nm, 30.70 nm, and 38.90 nm, respectively. A stable Q-switched pulse is achieved at an operating wavelength and peak power of 1562.30 nm and −6.47 dBm for the thickness of 17.80 nm, 1561.40 nm and −3.19 dBm for the thickness of 30.70 nm, and 1560.2 nm and −2.44 dBm for the thickness of 38.90 nm. The thickness of 38.90 nm exhibit a high repetition rate of 43.60 kHz and narrow pulse width of 4.83 µs compared to other thickness. Employing the tunable bandpass filter in the laser ring cavity gives the wide-tuning of the wavelength range of 19.69 nm, 31.86 nm, and 36.59 nm for the thickness of 17.80 nm, 30.70 nm, and 38.90 nm, respectively. The tunability of Q-switched with the thicknesses of 30.70 nm and 38.90 nm is realized in the region of C-band to L-band. Regarding the authors’ expertise, this seems to be the first proposed influence of thickness on the tunability of plasma sputtered ITO that serves as saturable absorber in a Q-switched pulse.

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Passively Q-switched erbium-doped fiber laser with mechanical exfoliation of 8-HQCDCL2H2O as saturable absorber

Cited by 15 publications

References 34 publications

Antimonene-based saturable absorber for a soliton mode-locked and Q-switched fiber laser in the 2 μm wavelength region

Antimonene-based saturable absorber for a soliton mode-locked and Q-switched fiber laser in the 2 μm wavelength region

Wavelength-tunable mode-locked laser using zinc phosphate as a saturable absorber at 1.9 μm

Influence of thickness on tunability performance of plasma sputtered indium tin oxide as Q-switcher

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