Ms. Rong Wang Profile

Rong Wang

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Proceedings Article | 29 December 2023 Paper

Efficient continuous-wave and passively Q-switched operation of yellow dysprosium lasers

Rong Wang, Yuxia Zhang

Proceedings Volume 12975, 129750D (2023) https://doi.org/10.1117/12.3015112

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The present study reports the performance of a Dy³⁺, Tb³⁺:LiLuF₄ yellow laser at 574 nm that could be efficiently operated in both continuous-wave (cw) and passive Q-switching modes. Using two blue InGaN-laser diodes as the pump source, a cw yellow laser was generated with an output power of 315 mW at the wavelength of 574 nm. The passively Q-switched pulse laser was obtained using Bi₂Se₃ and Bi₂Te₃ as saturable absorbers. The saturable absorbers prepared by the chemical vapor deposition method were characterized by Raman spectroscopy and atomic force microscope. The modulation depth and saturable intensity of saturable absorbers were explored by an irradiance-scan technique in a nanosecond regime. With 3.18 W of pump power absorbed, a pulsed output power of 45 mW was generated at 66.7 kHz of repetition frequency, with a minimum pulse width of 735 ns using Bi₂Se₃ as a saturable absorber. In the case of the Bi₂Te₃ saturable absorber, the shortest pulse duration of 828 ns is achieved at the pulse repetition frequency of 22.3 kHz, corresponding to the pulsed output power of 38 mW. The outcomes of the study suggest that Bi2Se3 and Bi2Te3 are potential nanomaterials for optoelectronic applications in the yellow regime.

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