Ag-nanoparticle as a Q switched device for tunable C-band fiber laser

Ahmad, Harith and Ruslan, N.E. and Ali, Z.A. and Reduan, S.A. and Lee, C.S.J. and Shaharuddin, R.A. and Nayan, N. and Ismail, Mohd Afiq (2016) Ag-nanoparticle as a Q switched device for tunable C-band fiber laser. Optics Communications, 381. pp. 85-90. ISSN 0030-4018, DOI

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The use of silver (Ag)-nanoparticle as saturable absorber (SA) to induce tunable Q-switched fiber laser in C-band is demonstrated. The Ag-nanoparticle SA exhibits modulation depth of 31.6% and saturation intensity of 0.54 MW cm−2. The SA is integrated into the laser cavity by sandwiching it between two fiber ferrules. Lasing in CW region starts at 10 mW, whereas stable self-starting Q-switching with a central wavelength of 1558.4 nm begins at 20 mW. As the pump power increases, the repetition rate varies from 10.5 kHz to 24.4 kHz and the narrowest pulse width obtained is around 6.5 µs. The Q-switched laser has a tuning range of 27.3 nm (1552.9–1580.2 nm). The stability of the pulse is verified from the radio-freqeuncy (RF) spectrum with a measured signal-to-noise ratio (SNR) of 46.22 dB. The ability of Ag-nanoparticle as an effective SA may lead to further development of pulsed fiber laser in the field of photonics.

Item Type: Article
Uncontrolled Keywords: Tunable Q-switching; Fiber laser; Silver nanoparticles; Saturable absorber; Erbium-doped fiber laser
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Aug 2017 06:43
Last Modified: 11 Oct 2018 03:27

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