Tunable multiwavelength erbium-doped fiber laser incorporating single-core comb filter at room temperature

Islam, Mohammad K.; Mohammad, Abu Bakar; Sikta, Jebun Naher; Ripa, N. N

doi:10.1016/j.ijleo.2015.08.047

Cited by 6 publications

(1 citation statement)

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“…Besides that, the Sagnac loop filter has a particular interest because of its several unique characteristics, for instance, simple configuration, low insertion loss, robust to temperature changes, polarization independent, large signal-to-noise ratio (SNR), real-time tuning of lasing lines using a polarization controller and less expensive compared to other techniques requiring circulators and nonlinear fibers [12]. Another merit of a Sagnac filter is that the wavelength spacing between adjacent channels can be tuned wide or narrow, depending only on the length of the birefringent fiber in the loop filter [13]. On the other hand, passive Q-switched fiber lasers have been extensively investigated in recent years owing to their favorable properties, such as compactness, easy fabrication and low cost [14].…”

Section: Introductionmentioning

confidence: 99%

Multiwavelength Q-switched erbium-doped fibre laser-based aluminum nanoparticles saturable absorber and sagnac loop filter

Salman

Al‐Janabi

2019

Laser Phys.

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In this paper, we experimentally demonstrate a stable multiwavelength Q-switched erbiumdoped fiber laser generation based on aluminum nanoparticles (AlNPs) as the saturable absorber (SA), with the aid of a Sagnac loop filter for the first time, to the best of author's knowledge. The fabricated AlNPs-SA has a modulation depth, a non-saturable loss and saturable intensity of 7%, 10% and 0.0015 MW cm −2 , respectively. By carefully adjusting the polarization controller and progressively increasing the pump power, up to 11 lasing lines in the Q-switching regime are obtained with a channel spacing and an optical signalto-noise ratio of 0.48 nm and 30 dB, respectively. Meanwhile, the Q-switched performance has a minimum pulse width of 2.36 µs and a maximum pulse repetition rate of 33.45 kHz by varying the pump power to 300 mW. The proposed laser may become valuable for numerous applications such as dense wavelength division multiplexing technology.

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Section: Introductionmentioning

confidence: 99%