VTe<sub>2</sub>: Broadband Saturable Absorber for Passively Q-Switched Lasers in the Near- and Mid-Infrared Regions

Zhang, Wenyao; Liang, Yuxian; Gan, Yiyu; Huang, Hongfu; Liang, Guowen; Kang, Qi; Leng, Xudong; Jing, Qun; Wen, Qiao

doi:10.1021/acsami.3c10790

Cited by 2 publications

(1 citation statement)

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“…Since the first discovery of graphene in 2004, atomically thin two-dimensional (2D) structural materials have become a research hotspot due to their unique optoelectronic properties, establishing great advantages in the construction of photonic and optoelectronic devices [ 1 , 2 , 3 , 4 , 5 ]. With the merits of broadband absorption [ 6 , 7 , 8 , 9 ], ultrafast carrier dynamic processing [ 10 , 11 ], excellent nonlinear optical response [ 12 ], easy parameter regulation [ 13 ], easy fabrication and intergradation [ 14 ], etc., 2D materials have been widely applied as saturable absorbers (SAs) to generate pulsed lasers [ 15 , 16 , 17 ], greatly facilitating the development of ultrafast lasers [ 18 ]. Since then, investigating novel 2D material-based SAs with excellent nonlinear optical performances is still in progress and has received widespread attention in the fields of materials and lasers [ 19 , 20 ].…”

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confidence: 99%

Nonlinear Optical Saturable Absorption Properties of 2D VP Nanosheets and Application as SA in a Passively Q-Switched Nd:YVO4 Laser

Guo,

Jia,

Yao

et al. 2024

Materials

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Two-dimensional (2D) violet phosphorus (VP) plays a significant role in the applications of photonic and optoelectronic devices due to its unique optical and electrical properties. The ultrafast carrier dynamics and nonlinear optical absorption properties were systematically investigated here. The intra- and inter-band ultrafast relaxation times of 2D VP nanosheets were measured to be ~6.83 ps and ~62.91 ps using the pump–probe method with a probe laser operating at 1.03 μm. The nonlinear absorption coefficient βeff, the saturation intensity Is, the modulation depth ΔR, and the nonsaturable loss were determined to be −2.18 × 104 cm/MW, 329 kW/cm2, 6.3%, and 9.8%, respectively, by using the Z-scan and I-scan methods, indicating the tremendous saturable absorption property of 2D VP nanosheets. Furthermore, the passively Q-switched Nd:YVO4 laser was realized with the 2D VP nanosheet-based SA, in which the average output power of 700 mW and the pulse duration of 478 ns were obtained. These results effectively reveal the nonlinear optical absorption characteristics of VP nanosheets, demonstrating their outstanding light-manipulating capabilities and providing a basis for the applications of ultrafast optical devices. Our results verify the excellent saturable absorption properties of 2D VP, paving the way for its applications in pulsed laser generation.

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Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Saturable Absorption Properties of 2D VP Nanosheets and Application as SA in a Passively Q-Switched Nd:YVO4 Laser

Guo,

Jia,

Yao

et al. 2024

Materials

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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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VTe₂: Broadband Saturable Absorber for Passively Q-Switched Lasers in the Near- and Mid-Infrared Regions

Cited by 2 publications

References 75 publications

Nonlinear Optical Saturable Absorption Properties of 2D VP Nanosheets and Application as SA in a Passively Q-Switched Nd:YVO4 Laser

Nonlinear Optical Saturable Absorption Properties of 2D VP Nanosheets and Application as SA in a Passively Q-Switched Nd:YVO4 Laser

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

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VTe2: Broadband Saturable Absorber for Passively Q-Switched Lasers in the Near- and Mid-Infrared Regions

Cited by 2 publications

References 75 publications

Nonlinear Optical Saturable Absorption Properties of 2D VP Nanosheets and Application as SA in a Passively Q-Switched Nd:YVO4 Laser

Nonlinear Optical Saturable Absorption Properties of 2D VP Nanosheets and Application as SA in a Passively Q-Switched Nd:YVO4 Laser

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

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VTe₂: Broadband Saturable Absorber for Passively Q-Switched Lasers in the Near- and Mid-Infrared Regions