22 May 2017 Passive mode-locking at S-band by single-mode thulium-doped fluoride fiber using a thin film PtAg/N-G saturable absorber
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Harith Bin Ahmad, Mojgan Tajdidzadeh, Majid Rezayi, Iraj Sadegh Amiri Ahmed, "Passive mode-locking at S-band by single-mode thulium-doped fluoride fiber using a thin film PtAg/N-G saturable absorber," Journal of Nanophotonics 11(2), 026008 (22 May 2017). https://doi.org/10.1117/1.JNP.11.026008 . Submission: Received: 22 March 2017; Accepted: 3 May 2017
Received: 22 March 2017; Accepted: 3 May 2017; Published: 22 May 2017
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