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Journal of Nanophotonics

Passive mode-locking at S-band by single-mode thulium-doped fluoride fiber using a thin film PtAg/N-G saturable absorber
Author(s): Harith Bin Ahmad; Mojgan Tajdidzadeh; Majid Rezayi; Iraj Sadegh Amiri Ahmed
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Paper Abstract

We report, for the first time to our knowledge, the usage of platinum silver bimetallic alloy forms on the synthesized N-Gns (PtAg/N-G) as a saturable absorber (SA) for the mode-locking of a thulium-doped fluoride fiber laser. The experimental results have demonstrated that PtAg/N-G exhibits saturable absorption in the 1.5 - μ m wavelength range and supports ultrashort pulse generation. Mode-locking occurred when the pump power rose to 340 mW, and the output spectrum had a peak at 1506 nm with the 3-dB bandwidth of 0.76    nm . The mode-locked pulse train against a cavity roundtrip time of 146 ns that corresponds to a pulse repetition rate around 6.85 MHz. The autocorrelation trace 7.43 ps with a full width at half maximum pulse width of 4.8 ps, and experimental data were closely fit with a sech 2 pulse shape and it indicates the generation of soliton pulse. The output power of this fiber laser is 3.24 mW; hence, the pulse energy is 0.31 nJ and peak power is about 56.9 mW as well. We demonstrate graphene-polymer nanocomposites could be an appropriate SA for high-power fiber laser mode-locking.

Paper Details

Date Published: 22 May 2017
PDF: 11 pages
J. Nanophoton. 11(2) 026008 doi: 10.1117/1.JNP.11.026008
Published in: Journal of Nanophotonics Volume 11, Issue 2
Show Author Affiliations
Harith Bin Ahmad, Univ. of Malaya (Malaysia)
Mojgan Tajdidzadeh, Univ. of Malaya (Malaysia)
Majid Rezayi, Univ. of Malaya (Malaysia)
Iraj Sadegh Amiri Ahmed, Univ. of Malaya (Malaysia)


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