Nickel oxide-embedded tapered fibre as a saturable absorber for ultrafast photonics

Che Aziz, S.A.; Mohd Yusoff, N.; Zainol Abidin, N.H.; Che Abdullah, C.A.; Idris, M.I.; Alresheedi, M.T.; Ng, E.K.; Mahdi, M.A.

doi:10.1016/j.ijleo.2023.171508

Optik

2023

DOI: 10.1016/j.ijleo.2023.171508

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Nickel oxide-embedded tapered fibre as a saturable absorber for ultrafast photonics

S.A. Che Aziz,

N. Mohd Yusoff,

N.H. Zainol Abidin

et al.

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2024

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Cited by 3 publications

References 45 publications

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Dual-wavelength mode-locked erbium fiber laser utilizing a Ge-PCF saturable absorber

Hanoon,

Abdulhadi,

Abass

2024

Appl. Opt.

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In this work, we demonstrate a mode-locked erbium-doped fiber laser (EDFL) based on germanium-core doped photonic crystal fiber (Ge-PCF) as a passive saturable absorber (SA). The proposed SA was incorporated inside the PCF core during the manufacturing process. The short length of the proposed high nonlinear fiber can achieve a stable mode-locked pulse by controlling the fiber and collapsing lengths. The proposed Ge-PCF has been integrated into an erbium-doped fiber ring laser to establish the desired ultrashort pulse with the merits of a short interaction length (<3cm), enhanced damage threshold, environmental robustness, ease of manufacture, and suitable mass production. The obtained output pulses at FWHM have a pulse width of 800 ps and a repetition rate of ∼19MHz. Furthermore, the EDFL based on Ge-PCF achieved a dual-wavelength output spectrum with narrow bandwidths centered at 1557.27 and 1558.81 nm. The short-pulse capabilities of the proposed fiber laser make it highly suitable for a wide range of photonic applications.

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Dual-wavelength mode-locked erbium fiber laser utilizing a Ge-PCF saturable absorber

Hanoon,

Abdulhadi,

Abass

2024

Appl. Opt.

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On the Synthesis of Graphene Oxide/Titanium Dioxide (GO/TiO2) Nanorods and Their Application as Saturable Absorbers for Passive Q-Switched Fiber Lasers

ul Abedin,

ul Haq,

Ahmed

et al. 2024

Nanomaterials

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We report passively Q-switched pulse operation through an erbium-doped fiber laser (EDFL) utilizing graphene oxide/titania (GO/TiO2) nanorods as a saturable absorber. The GO/TiO2 nanorods were fabricated using a Sol–gel-assisted hydrothermal method. The optical and physical characterization of the GO/TiO2 was then characterized using a field-emission-scanning electron microscope (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), and diffuses reflectance spectroscopy (DRS). To investigate the performance of the Q-switched EDFL based on the GO/TiO2 SA, the prepared nanorods were mechanically deposited on the fiber ferrule employing adhesion effects of in-dex-matching gel. This integration of the nanorod SA resulted in a self-starting Q-switching opera-tion initiated at a pump power of 17.5 mW and sustained up to 306.9 mW. When the pump range was tuned from 17.5 to 306.9 mW, the emission wavelength varied from 1564.2 to 1562.9 nm, pulse repetition rates increased from 13.87 kHz to 83.33 kHz, and pulse width decreased from 30.27 µs to 3.75 µs. Moreover, at the maximum pump power of 306.9 mW, the laser exhibited an average output power of 0.74 mW, a peak power of 1.54 mW, and a pulse energy of 8.88 nJ. Furthermore, this study investigates the GO/TiO2 damage threshold and prolonged stability of the proposed EDFL system.

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Palladium Nanocubes as Saturable Absorbers for Mode-Locked Laser Generation at 1.56 μm

Kang,

Wang

2024

Nanomaterials

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Palladium (Pd) nanocubes, a type of metallic nanostructure, have demonstrated remarkable optoelectronic properties, garnering significant attention. However, their nonlinear optical characteristics and related device applications remain underexplored. In this study, we report the fabrication of a novel saturable absorber (SA) by depositing Pd nanocubes onto a D-shaped fiber (DF). The Pd nanocubes, with an average size of 12 nm, were synthesized and integrated with a DF, resulting in a highly robust SA with broadband saturable absorption characteristics. When incorporated into Er3+-doped laser cavities, the Pd-DF SA enabled the generation of ultrafast pulses with a central wavelength of 1560 nm, a corresponding repetition rate of 26.7 MHz, and a temporal width of 1.85 ps. Our findings highlight the strong potential of the Pd-DF device as a versatile SA for constructing high-energy ultrafast fiber lasers.

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Nickel oxide-embedded tapered fibre as a saturable absorber for ultrafast photonics

Cited by 3 publications

References 45 publications

Dual-wavelength mode-locked erbium fiber laser utilizing a Ge-PCF saturable absorber

Dual-wavelength mode-locked erbium fiber laser utilizing a Ge-PCF saturable absorber

On the Synthesis of Graphene Oxide/Titanium Dioxide (GO/TiO2) Nanorods and Their Application as Saturable Absorbers for Passive Q-Switched Fiber Lasers

Palladium Nanocubes as Saturable Absorbers for Mode-Locked Laser Generation at 1.56 μm

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