Pulse compression in Q-switched fiber laser by using platinum as saturable absorber

Yuzaile, Y.R.; Awang, Noor Azura; Zalkepali, N.U.H.H.; Zakaria, Zahariah; Latif, Amirah Abdul; Azmi, Ahmad Najib; Hadi, Fatin Shaqira Abdul

doi:10.1016/j.ijleo.2018.11.057

Cited by 12 publications

(1 citation statement)

References 38 publications

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“…However, the applications of active approaches are limited because it needs a sizable and costly external modulator to induce and restore a high Q-factor to generate pulses [7]. Saturable absorber (SA) material [8][9][10][11], semiconductor saturable absorber mirror (SESAM) [12][13][14], and nonlinear polarization rotation (NPR) [15,16] are passive components that passive techniques merely add to the ring cavity to generate pulses in the laser cavity. SESAM is the most often used SA in solid-state lasers for producing passive Q-switched fiber lasers by adjusting factors like recovery time, saturation energy, and absorption.…”

Section: Introductionmentioning

confidence: 99%

Influence of thickness on tunability performance of plasma sputtered indium tin oxide as Q-switcher

Zalkepali¹,

Mahmud²,

Awang³

et al. 2023

Laser Phys.

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We successfully investigated the influence of thickness on the tunability performance of plasma-sputtered indium tin oxide (ITO) as a Q-switcher. ITO is coated using direct current magnetron sputtering techniques with sputtering times of 150 s, 250 s, and 350 s to generate excellent quality ITO. Filmetrics measures the thickness, yielding 17.80 nm, 30.70 nm, and 38.90 nm, respectively. A stable Q-switched pulse is achieved at an operating wavelength and peak power of 1562.30 nm and −6.47 dBm for the thickness of 17.80 nm, 1561.40 nm and −3.19 dBm for the thickness of 30.70 nm, and 1560.2 nm and −2.44 dBm for the thickness of 38.90 nm. The thickness of 38.90 nm exhibit a high repetition rate of 43.60 kHz and narrow pulse width of 4.83 µs compared to other thickness. Employing the tunable bandpass filter in the laser ring cavity gives the wide-tuning of the wavelength range of 19.69 nm, 31.86 nm, and 36.59 nm for the thickness of 17.80 nm, 30.70 nm, and 38.90 nm, respectively. The tunability of Q-switched with the thicknesses of 30.70 nm and 38.90 nm is realized in the region of C-band to L-band. Regarding the authors’ expertise, this seems to be the first proposed influence of thickness on the tunability of plasma sputtered ITO that serves as saturable absorber in a Q-switched pulse.

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