Journal
NANOMATERIALS
Volume 11, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/nano11123243
Keywords
pulsed laser; optical modulator; saturable absorber; nanoparticles
Categories
Funding
- FundingNational Key Research and Development Program of China [2019YFA0705000]
- National Natural Science Foundation of China [91950106, 91950104, 11974218, 91750201]
- Local Science and Technology Development Project of the Central Government [YDZX20203700001766]
- Innovation Group of Jinan [2018GXRC010]
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Mo:BiVO4 nanoparticles were successfully used as an optical modulator in a Q-switched all-solid-state Tm:YAP laser for the first time, showing good nonlinear optical parameters in the 2-μm region.
Mo:BiVO4 nanoparticles were employed as an optical modulator in a Q-switched all-solid-state Tm:YAP laser for the first time. The nonlinear optical parameters of Mo:BiVO4 nanoparticles in the 2-mu m region were characterized by measuring nonlinear transmission. Saturation intensity was 718 MW/cm(2), and the modulation depth was 12.3%. A stable pulse sequence was acquired with a 70.08 kHz maximum repetition rate and an 821 ns pulse width. The maximum output average power was 153 mW, corresponding to 2.18 mu J single pulse energy and 2.67 W peak power. Although the response wavelength of Mo:BiVO4 is in visible light region, our experimental results demonstrates that a saturable absorption effect for wavelengths much longer than visible light (2 mu m wavelength) is still possible due to sub-bandgap absorption. Therefore, we experimentally proved that Mo:BiVO4 nanoparticles are a great candidate for use as an optical modulator of a 2-mu m pulsed laser.
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