Femtosecond mode-locked laser at 1.5 μm region using topological semimetals NbAs nanosheets

Li, Zhen; Long, Hui; Wen, Min-Ru; Dong, Hua-Feng; Tao, Li-Li; Wu, Fu-Gen; Chen, Li

doi:10.1016/j.optlastec.2024.110784

Cited by 1 publication

(1 citation statement)

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“…The nonlinear optical characteristics of the Y1, Y2, and Y3 SAs under varying levels of pump power were measured in the system, as shown in figures 5(b)-(d). The experimental data were fitted using the following SA model function [41].…”

Section: Nonlinear Optical Properties Of the Samplesmentioning

confidence: 99%

Saturable absorption properties of mixed lead-tin halide perovskites and their application in near-infrared ultrafast lasers

Lan,

Yang,

Wei

et al. 2024

J. Phys. D: Appl. Phys.

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Mixed lead-tin halide perovskites, as highly sensitive materials in the near-infrared region, hold significant potential for optoelectronic device applications. Here, mixed lead-tin halide perovskite saturable absorbers (SAs) have been developed by coupling with the side-polished surfaces of the single-mode fibers and excellent saturable absorption effects of the mixed lead-tin halide perovskite SAs have been demonstrated in the near-infrared region. By constructing the in-gap site assisted carrier transfer mode, the saturation absorption process of the mixed lead-tin halide perovskite SAs can be well explained, in which defects as in-gap sites can help the photon-generated carriers transfer into the conduction band and promote the Pauli-blocking-induced absorption bleaching in the SA. Moreover, ytterbium-doped fiber lasers based on perovskite SAs have been fabricated, and mode-locked operations at 1040 nm are achieved using the mixed lead-tin halide perovskite SA, generating ultra-short pulses with a pulse width of 683 fs, 3dB bandwidth of 4.88 nm, signal-to-noise ratio exceeding 49.74 dB, and a repetition rate of 3.74 MHz. Our findings demonstrate that the mixed lead-tin halide perovskite SAs have excellent optical modulation capability and promising applications in the field of ultrafast photonics.

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Section: Nonlinear Optical Properties Of the Samplesmentioning

confidence: 99%