Q-switched fiber laser based on CdS quantum dots as a saturable absorber

Radzi, N.M.; Latif, Amirah Abdul; Ismail, M. F.; Liew, Josephine Ying Chyi; Wang, E.; Lee, H.K.; Tamcheck, N.; Awang, Nik Azimatolakma; Ahmad, Fauzan; Halimah, M.K.; Ahmad, Harith

doi:10.1016/j.rinp.2020.103123

Cited by 31 publications

(16 citation statements)

References 59 publications

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“…11 The generated CdS/PVA matrix Qswitched fiber laser had a repetition rate, a pulse width, and a peak-to-peak pulse duration of 75.19 kHz, 1.27 ms, and 13.32 ms, respectively. 13 However, toxic heavy metals in such QDs might pose significant risks to the health and the environment. 14 InP-based QDs gained considerable scientific and technological interests owing to their relatively low toxicity level and high abundance.…”

Section: Introductionmentioning

confidence: 99%

“…11 The generated CdS/PVA matrix Q-switched fiber laser had a repetition rate, a pulse width, and a peak-to-peak pulse duration of 75.19 kHz, 1.27 μs, and 13.32 μs, respectively. 13 However, toxic heavy metals in such QDs might pose significant risks to the health and the environment. 14…”

Section: Introductionmentioning

confidence: 99%

“…9,10 Recently, Pb-and Cd-based QDs have been introduced as SAs in the fiber laser system, and the generation of an ultrafast laser pulse has been demonstrated. [11][12][13] Oleic acid capped colloidal PbS QDs as a SA, exhibiting a modulation depth of up to 44.5% and a transform-limited solution pulse as short as 559 fs with a bandwidth of 4.78 nm are realized when incorporating PbS into a fiber laser. 12 PMMA-hosted CdSe QDs have been employed to achieve Q-switching operation with a repetition rate of 24.45 to 40.50 kHz while varying the pump power from 975 to 1196 mW.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Surface fluorination treated indium-based quantum dots as a nonlinear saturable absorber for a passive Q-switched 1.0 μm laser

Zhang¹,

Lou

Hu³

et al. 2022

Mater. Adv.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Surface fluorination treated indium-based quantum dots as a nonlinear saturable absorber for a passive Q-switched 1.0 μm laser

Zhang¹,

Lou

Hu³

et al. 2022

Mater. Adv.

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“…Ahmad et al reported a Q-switched Er-doped fiber laser for 1.55 µm operation [8] and a mode-locked Tm-doped fiber laser using ZnO NPs for 2 µm operation [9]. CdS quantum dots as SA have been used in an Er-doped fiber laser to generate Q-switched pulses [10]. Besides ZnO, the use of oxide semiconductors such as TiO 2 , Al 2 O 3 , NiO, and Fe 3 O 4 NPs as optical modulators has also been demonstrated in previous reports [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Mo:BiVO4 Nanoparticles-Based Optical Modulator and Its Application in a 2-μm Pulsed Laser

et al. 2021

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Mo:BiVO4 nanoparticles were employed as an optical modulator in a Q-switched all-solid-state Tm:YAP laser for the first time. The nonlinear optical parameters of Mo:BiVO4 nanoparticles in the 2-μm region were characterized by measuring nonlinear transmission. Saturation intensity was 718 MW/cm2, and the modulation depth was 12.3%. A stable pulse sequence was acquired with a 70.08 kHz maximum repetition rate and an 821 ns pulse width. The maximum output average power was 153 mW, corresponding to 2.18 μJ single pulse energy and 2.67 W peak power. Although the response wavelength of Mo:BiVO4 is in visible light region, our experimental results demonstrates that a saturable absorption effect for wavelengths much longer than visible light (2 μm wavelength) is still possible due to sub-bandgap absorption. Therefore, we experimentally proved that Mo:BiVO4 nanoparticles are a great candidate for use as an optical modulator of a 2-μm pulsed laser.

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“…[ 19,20 ] Recently, QDs based on group II–VI chalcogenides (cadmium sulfide, CdS; cadmium selenide, CdSe) and group IV–VI chalcogenides (lead sulfide, PbS) have been introduced as SAs in the fiber laser system, and the generation of ultrafast laser pulses has been demonstrated. [ 21–23 ] However, Pb‐ and Cd‐based QDs are toxic heavy metals that might pose significant risks to the environment. [ 24 ] Therefore, low‐toxicity QDs are gaining considerable scientific and technological interest.…”

Section: Introductionmentioning

confidence: 99%

Tin Telluride Quantum Dots as a Novel Saturable Absorber for Q‐Switching and Mode Locking in Fiber Lasers

Ahmed

Qiao

Cheng

et al. 2020

Advanced Optical Materials

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Tin telluride (SnTe) quantum dots (QDs) have attracted considerable interest in the optoelectronic field owing to their favorable properties over conventional QDs, such as a relatively large Bohr radius (95 nm) and low toxicity level. However, till date, the nonlinear optical properties and ultrafast photonics applications of SnTe QDs have remained unexplored. In this study, SnTe QDs with an average diameter of 74 nm (smaller than the Bohr radius of SnTe) are fabricated via a liquid‐phase exfoliation method. Consequently, the nonlinear saturable absorption properties of such SnTe QDs are explored by realizing a modulation depth of 2.2% and saturable intensity of 1.67 GW cm−2. The prepared QDs are then used as saturable absorber (SA) in the erbium‐doped fiber laser ring cavity system. Moreover, Q‐switched and mode‐locked laser pulses with a pulse width of 1.81 µs and 691 fs are generated, respectively. Harmonic mode‐locking with a high repetition rate of 62.1 MHz (fifth order) is experimentally realized. This is the first demonstration, to the authors’ knowledge, of using SnTe QDs‐SA for generating ultrafast laser pulses along with high‐repetition‐rate harmonic mode‐locking pulses. Therefore, this study will establish a new research scope for SnTe QDs in ultrafast photonics, nonlinear photonics, frequency combs, and optical communications.

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Q-switched fiber laser based on CdS quantum dots as a saturable absorber

Cited by 31 publications

References 59 publications

Surface fluorination treated indium-based quantum dots as a nonlinear saturable absorber for a passive Q-switched 1.0 μm laser

Surface fluorination treated indium-based quantum dots as a nonlinear saturable absorber for a passive Q-switched 1.0 μm laser

Mo:BiVO4 Nanoparticles-Based Optical Modulator and Its Application in a 2-μm Pulsed Laser

Tin Telluride Quantum Dots as a Novel Saturable Absorber for Q‐Switching and Mode Locking in Fiber Lasers

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