Pulsed-laser-ablated gold-nanoparticles saturable absorber for mode-locked erbium-doped fiber lasers
We demonstrate the optical performance of passively mode-locked pulses in erbium-doped fiber laser incorporating gold-nanoparticles (Au-NPs) as a saturable absorber (SA). Au-NPs of diameters between 5 to 15 nm were synthesized using the pulsed laser ablation method and blended with polydimethylsilox...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Elsevier Ltd
2022
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/42650/1/Pulsed-laser-ablated%20gold-nanoparticles%20saturable%20absorber.pdf http://umpir.ump.edu.my/id/eprint/42650/2/Pulsed-laser-ablated%20gold-nanoparticles%20saturable%20absorber%20for%20mode-locked%20erbium-doped%20fiber%20lasers_ABS.pdf http://umpir.ump.edu.my/id/eprint/42650/ https://doi.org/10.1016/j.optlastec.2022.107875 https://doi.org/10.1016/j.optlastec.2022.107875 |
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| Summary: | We demonstrate the optical performance of passively mode-locked pulses in erbium-doped fiber laser incorporating gold-nanoparticles (Au-NPs) as a saturable absorber (SA). Au-NPs of diameters between 5 to 15 nm were synthesized using the pulsed laser ablation method and blended with polydimethylsiloxane polymer. The resulting nanocomposite was deposited on the tapered region of a microfiber with a spin-coating method. The proposed Au-NPs SA recorded a modulation depth of 0.4% and low saturation intensity of 0.1 MW/cm2 leading to stable mode-locking operation in the erbium-doped fiber laser cavity at a low threshold pump power of about 45.6 mW. A mode-locked pulse train with a duration of 933 fs, pulse repetition rate of 6.25 MHz, and peak-to-pedestal extinction ratio of 54.1 dB was achieved at a pump power of 168.1 mW. The obtained results demonstrate that the spherical Au-NPs synthesized by pulsed laser ablation is a feasible material for SA fabrication, validating its saturable absorption properties in a 1.55 μm wavelength region. |
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