Passively Q-switched erbium-doped fiber laser at C-band region based on WS_2 saturable absorber

Ahmad, Harith; Ruslan, N.E.; Ismail, Mohamed A.; Reduan, Siti Aisyah; Lee, C S J; Sathiyan, S; Sivabalan, S.; Harun, Sulaiman Wadi

doi:10.1364/ao.55.001001

Cited by 63 publications

(19 citation statements)

References 23 publications

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“…Furthermore, the insertion loss by the WSSe-based SA is about 6 dBm, which further affects the efficiency of the laser cavity. However, the conversion efficiency is comparable to other passively Q-switched laser works [15][16][17] .…”

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confidence: 70%

Passive Q-switching in an erbium-doped fiber laser using tungsten sulphoselenide as a saturable absorber

2018

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A highly stable Q-switched laser incorporating a mechanically exfoliated tungsten sulphoselenide (WSSe) thin sheet saturable absorber (SA) is proposed and demonstrated. The SA assembly, formed by sandwiching a thin WSSe sheet between two fiber ferrules within the erbium-doped fiber laser, is used to effectively modulate the laser cavity losses. The WSSe-based SA has a saturation intensity of ∼0.006 MW∕cm 2 and a modulation depth of 7.8%, giving an optimum Q-switched laser output with a maximum repetition rate of 61.81 kHz and a minimum pulse width of 2.6 μs. The laser's highest output power of 0.45 mW and highest pulse energy of 7.31 nJ are achieved at the maximum pump power of 280.5 mW. The tunability of the cavity's output at the maximum pump power is analyzed with a C-band tunable bandpass filter, giving a broad tunable range of ∼40 nm, from 1530 nm to 1570 nm. The output performance of the tunable Q-switched laser correlates well with the gain spectrum of erbium-doped fibers, with the shift in the gain profile as a result of the saturated SA.

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confidence: 70%

Passive Q-switching in an erbium-doped fiber laser using tungsten sulphoselenide as a saturable absorber

2018

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“…1, the repetition rate of the proposed system was comparable to that of other similar works (Wang et al 2012;Ahmad et al 2018c;Ahmad et al 2018b). While the work by Ahmad et al (Ahmad et al 2016b) was able to generate outputs with a higher maximum repetition rate as well as higher maximum pulse energy, the system proposed in this work was able to generate output pulses with a smaller minimum pulse width that could be tuned along the C-band region. On the other hand, the SAs based on graphene (Wang et al 2012) and In2Se3 (Ahmad et al 2018c) were only able to generate output pulses with a lower maximum repetition rate and larger minimum pulse width as compared to our reported output pulses.…”

Section: Resultsmentioning

confidence: 77%

Cu2Te-PVA as saturable absorber for generating Q-switched erbium-doped fiber laser

et al. 2021

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A passively Q-switched erbium-doped fiber laser (EDFL) using copper telluride-polyvinyl alcohol (Cu2Te-PVA) thin film as saturable absorber (SA) was proposed and demonstrated. The generated Q-switched pulses could be tuned over a tuning range of 44 nm from 1530 nm to 1574 nm, with the addition of a tunable bandpass filter (TBPF) into the C-band laser cavity. The pump power of 130.1 mW to 221.0 mW was used to observe the output pulses, which had repetition rates from 51.3 kHz to 61.7 kHz, with a minimum pulse width of around 1.84 µs and highest pulse energy of 7 nJ. The generated pulses were stable with a constant signal to noise ratio (SNR) value of around 51 dB when tested under continuous operation over a period of 60 minutes. To the best of our knowledge, this is the first demonstration of Q-switched pulses induced by a Cu2Te-PVA based SA in an EDFL.

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“…Q-switched fiber laser based on saturable absorber has been useful in light source and widely potential for use in application such as telecommunication, medicine, fiber optic sensing, remote sensing, range finding and industrial processing [1]. The generation of short pulses is also called a Q-switching operation.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Comparison Q-Switched Fiber Laser Generation using Graphene as Saturable Absorber

Awang

Aziz

Azmi

et al. 2018

MATEC Web of Conferences

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We demonstrated the comparison experimentally and numerically a compact Q-switched erbium-doped fiber (EDF) laser based on graphene as a saturable absorber (SA). By optically driven deposition of graphene on a fiber core, the SA is constructed and inserted into a diode-pumped EDF laser cavity. Lasing in CW region starts at 10 mW, whereas stable self-starting Q-switching with a central wavelength of 1530 nm begins at 18 mW. In this paper, at 35 mW, the maximum pulse energy reaches at 2 μJ with pulse repetition rate of 1 MHz and the narrowest pulse width is around 10 μs is obtained. The stability of the pulse is verified from the radio-frequency (RF) spectrum with a measured signal-to-noise ratio (SNR) of 48 dB. In this study, the design is compared with the simulation using the Optisystem software. The output power of the experimental study is also compared with the simulation to examine the performance.

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Passively Q-switched erbium-doped fiber laser at C-band region based on WS_2 saturable absorber

Cited by 63 publications

References 23 publications

Passive Q-switching in an erbium-doped fiber laser using tungsten sulphoselenide as a saturable absorber

Passive Q-switching in an erbium-doped fiber laser using tungsten sulphoselenide as a saturable absorber

Cu2Te-PVA as saturable absorber for generating Q-switched erbium-doped fiber laser

Experimental and Numerical Comparison Q-Switched Fiber Laser Generation using Graphene as Saturable Absorber

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