Conductive graphene as passive saturable absorber with high instantaneous peak power and pulse energy in Q-switched regime

Zuikafly, Siti Nur Fatin; Khalifa, A.; Ahmad, Fauzan; Shafie, Suhaidi; Harun, S. W.

doi:10.1016/j.rinp.2018.03.002

Cited by 21 publications

(11 citation statements)

References 27 publications

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“…The current results are comparable to the previous research findings based on graphene as an SA. The graphene-SA could achieve Qswitched pulse at rate of repetition of 47.94-67.8 kHz, and pulses width of 9.58-6.02 µs [21]. The pulse width is comparatively much shorter in our work.…”

Section: Methodsmentioning

confidence: 63%

Q-switched EDF LASER Cavity using ITO as Saturable Absorber

Nizmani

Memon

Chowdhary

et al. 2021

SSURJET

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In this work, we have experimentally reported Q-switched pulse generation by indium tin oxide as a saturable absorber. First the glass slide was placed in electron beam deposition chamber and indium tin oxide layer was coated over the glass slide. Then the indium tin oxide was exfoliated from the glass slide, over the fiber ferrules in erbium doped fiber laser cavity. The Q-switched laser operated at center wavelength of 1562.6 nm. The repetition rate and pulse width were obtained to be 48.31-64.52 kHz and 5.65-4.23 µs, respectively.

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Section: Methodsmentioning

confidence: 63%

Q-switched EDF LASER Cavity using ITO as Saturable Absorber

Nizmani

Memon

Chowdhary

et al. 2021

SSURJET

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“…The sp 2 phonon vibrations cause peaks in the broad G band. The 2D band represents the fingerprint for Graphene as a nanocomposite with the G band confirming a multi-layered graphene flex [21].…”

Section: Raman Spectroscopymentioning

confidence: 91%

Oxygen free graphene/TiO2 nanocomposite synthesis technique for dye-sensitized solar cells photo-anode

AlSultan

Mustafa

Shafie

et al. 2020

IJEECS

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This article presents the techniques for the synthesis of oxygen-free graphene for doped in titanium dioxide TiO2. This work hypothesised the introduction of a new method for incorporating graphene nanoplatelets GNP in Anatase TiO2 using adhesive nanocomposite material, which has been done to enhance the conductivity of the nanocomposite. This work also argues with lamina problems in Graphene oxide, which reduce electron mobility and cause the electron pathways to be rerouted. The characteristics of the nanocomposite measure the colour difference, the photocurrent-voltage measurement (I-V measurement), Raman Spectroscopy, and Energy Dispersive Spectroscopy EDS. Simple visual observation results for various thin films show a colour shade difference due to the better dispersion of the nanocomposites. The uniform colour change with different weight ratios can also show the distribution of graphene sheets. Similarly, similar ratios to photocurrent-voltage readings were obtained by the different nanocomposite weights in I-V measurement. The Raman spectroscopy also recognises the existence of well-composed 2D energy band GNP sheets cooperated inside the TiO2. Finally, the work concludes with the reduction of the oxygen in weight ratios atomic, which lead to a better atomic level and the optimal weight ratio of GNP sheets to Titanium to increase the free mobility of electrons.

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“…Because of their high peak power, Q-switched lasers are frequently utilized in material processing [2] cosmetics, tattoo removal [3], range finding, optical sensor medicine and data storage industries [4]- [6]. Active and passive Q-switching are two methods for achieving Q-switching [7], [8]. The active Q-switching method needs an extra device, namely, an electro-optic or acousto-optic device [1], [9], [10], whereas, the passive Q-switching method does not require those two devices.…”

Section: Introductionmentioning

confidence: 99%

Passively Q-switched erbium doped fiber laser based on graphene and carbon nanotube saturable absorbers

Mafroos

Sapingi

Hamzah

2022

IJEECS

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A passively Q-switched erbium-doped fiber laser (EDFL) was experimented on by employing graphene, single walled carbon nanotubes (SWCNT) and multi-walled carbon nanotube (MWCNT) saturable absorbers (SA). The SA film was obtained by embedding the graphene, SWCNT and MWCNT into polyvinyl alcohol (PVA). The graphene SA was prepared by dipping a PVA thin film into the graphene solution while carbon nanotubes SAs were prepared using the casting method and placed in the ring cavity to produce a stable pulse laser. Graphene, SWCNT and MWCNT SAs were operating at wavelengths of 1558.92 nm, 1557.98 nm and 1558.51 nm, respectively, whereas the continuous wave was 1560.72 nm at the input pump power of 56 mW. The pulse energy, output power, repetition rate and pulse width were compared in graphene, SWCNT and MWCNT SAs. The shortest pulse width retrieved in graphene, SWCNT and MWCNT were 3.90 µs, 3.62 µs 4.43 µs and produced at the repetition rate of 115.00 kHz, 130.70 kHz, and 89.13 kHz, respectively. In comparison to graphene and SWCNT SAs, MWCNT SAs exhibit the best performance in terms of output power of 2.19 mW and high pulse energy of 24.57 nJ in passively Q-switched EDFL.

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Conductive graphene as passive saturable absorber with high instantaneous peak power and pulse energy in Q-switched regime

Cited by 21 publications

References 27 publications

Q-switched EDF LASER Cavity using ITO as Saturable Absorber

Q-switched EDF LASER Cavity using ITO as Saturable Absorber

Oxygen free graphene/TiO2 nanocomposite synthesis technique for dye-sensitized solar cells photo-anode

Passively Q-switched erbium doped fiber laser based on graphene and carbon nanotube saturable absorbers

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