High-Density Well-Aligned Single-Walled Carbon Nanotubes for Application as a Saturable Absorber with a High-Pass Filter Effect in an Erbium-Doped Ultra-Short-Pulse Fiber Laser

Lazdovskaia, Uliana S.; Orekhov, Ilya O.; Ismaeel, Almikdad; Feifei, Yan; Dvoretskiy, Dmitriy A.; Sazonkin, Stanislav G.; Karasik, Valeriy E.; Denisov, Lev K.; Davydov, Valeriy A.

doi:10.1021/acsanm.3c04766

Cited by 2 publications

(1 citation statement)

References 38 publications

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“…Several types of SAs are commonly used in fiber lasers, and a few of them are semiconductor saturable-absorber mirrors (SESAMs) [17], graphene [18], carbon nanotube [19], topological insulators [20], transition metal dichalcogenides [21], oxide-based thin-films [22,23], black-phosphorus [24] and quantum-dots [25]. Typically, these SAs materials lead toward higher absorption at lower optical intensities and become transparent at relatively higher intensities making these materials suitable for the generation of ultrashort pulses of light.…”

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confidence: 99%

Passively Q-Switched Er-Doped Fiber Laser Based on Bentonite Clay (Al2H2O6Si) Saturable Absorber

Asghar,

Khalid,

Sohail

et al. 2024

Micromachines

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This paper presents the investigations toward the direct use of bentonite clay (Al2H2O6Si) nanoparticles to act like a saturable absorber (SA) for the Q-switched pulse operation of an erbium-doped fiber laser (EDFL). The measured results reveal that with the incorporation of bentonite clay nanopowder as a SA, an EDFL is realized with a Q-switching mechanism starting at a pump power of 30.8 mW, and a Q-switched emission wavelength was noticed at 1562.94 nm at 142 mW pump power. With an increased pump from 30.8 mW to 278.96 mW, the temporal pulse parameters including minimum pulse duration and maximum pulse repetition rates were reported as 2.6 µs and 103.6 kHz, respectively. The highest peak power, signal-to-noise ratio, output power and pulse energy were noticed to be 16.56 mW, 51 dB, 4.6 mW, and 47 nJ, respectively, at a highest pump power of 278.96 mW. This study highlights the significance of bentonite clay (Al2H2O6Si) nanoparticles as a potential candidate for a saturable absorber for achieving nonlinear photonics applications.

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Section: Introductionmentioning

confidence: 99%

Passively Q-Switched Er-Doped Fiber Laser Based on Bentonite Clay (Al2H2O6Si) Saturable Absorber

Asghar,

Khalid,

Sohail

et al. 2024

Micromachines

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Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser

Muhammad,

Hamdan

2024

Laser Phys.

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We demonstrate the modulation of laser bandwidth by utilizing an ultranarrow tunable bandpass filter (UNTBF) in a passively Q-switched erbium-doped fiber laser. The passive Q-switch mechanism is enabled by using carbon nanotubes as saturable absorber at a Q-switched threshold of 35.5 mW. Based on spectral filtering effect introduced by the UNTBF, the 3 dB laser bandwidth can be tuned from 0.016 nm to 0.478 nm at a fixed pump power of 75.9 mW. The corresponding pulse behavior for each different bandwidth is characterized, and the results reveals that the pulse width can be as well tuned from 7.8 to 2.6 μs against the laser bandwidth, which agrees with the rule of time-bandwidth product. Correspondingly, the pulse repetition rate and the pulse energy vary from 16.23 kHz to 26.16 kHz and from 0.67 to 1.03 μJ respectively across the laser bandwidth. Further investigation of the pulse performance is performed against the pump power increment up to 107.2 mW. To the best of our knowledge, this is the first demonstration of spectrum bandwidth modulation in a passively Q-switched fiber laser, which can be useful for fully exploiting the possibilities of Q-switched pulse applications.

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High-Density Well-Aligned Single-Walled Carbon Nanotubes for Application as a Saturable Absorber with a High-Pass Filter Effect in an Erbium-Doped Ultra-Short-Pulse Fiber Laser

Cited by 2 publications

References 38 publications

Passively Q-Switched Er-Doped Fiber Laser Based on Bentonite Clay (Al2H2O6Si) Saturable Absorber

Passively Q-Switched Er-Doped Fiber Laser Based on Bentonite Clay (Al2H2O6Si) Saturable Absorber

Bandwidth modulation and pulse characterization of passively Q-switched erbium-doped fiber laser

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