Ultrashort pulse laser at 1564.3 nm wavelength with E-beam deposited copper nanoparticles saturable absorber

•Mode-Locked pulse in Erbium-doped fiber laser cavity with copper nanoparticles (Cu-NP) saturable absorber.•Cu-NP saturable absorber fabricated using electron beam deposition.•High modulation depth of about 36%.•Repetition rate recorded ~ 1.88 MHz with 7.95 nJ maximum pulse energy increasing pump po...

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Bibliographic Details
Published in:Optics and laser technology 2021-04, Vol.136, p.106791, Article 106791
Main Authors: Muhammad, A.R., Markom, A.M., Harun, S.W., Jusoh, Z., Yupapin, P.
Format: Article
Language:English
Subjects:
Absorbers
Copper
Copper saturable absorber
Electron beams
Erbium-doped fiber laser
Laser beams
Laser outputs
Lasers
Mode-lock
Nanoparticles
Noise levels
Polyvinyl alcohol
Pulse duration
Signal to noise ratio
Solitary waves
Soliton
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Summary:•Mode-Locked pulse in Erbium-doped fiber laser cavity with copper nanoparticles (Cu-NP) saturable absorber.•Cu-NP saturable absorber fabricated using electron beam deposition.•High modulation depth of about 36%.•Repetition rate recorded ~ 1.88 MHz with 7.95 nJ maximum pulse energy increasing pump power at 44–133 mW input power range.•Strong SNR value of 71 dB recorded. The experimental investigation to explore the generated laser output by using newly developed copper nanoparticle (Cu-NP) as a saturable absorber (SA) at 1550 nm operating region is presented. Accordingly, the light-material interaction between copper nanoparticles and PolyVinyl-Alcohol (PVA) film interpreted onto the modulation depth of Cu-NP was recorded at about 36 (0.14)% wherein the laser ring cavity consists of all-fibre components that are compatible with the proposed operating window. A ~ 1.88 MHz passively soliton mode-locked at 1564.3 nm with pulse-width of 2.85 (0.16) ps and 7.95 (1.7) nJ of maximum pulse energy was successfully generated. Moreover, the high signal to noise ratio of 71 dB while maintaining long term stability as well as low threshold power suggests that the properties owned by pure copper nanoparticles as a great alternative towards conventional saturable absorber.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2020.106791