Search: id:"swepub:oai:research.chalmers.se:7957b3cc-e63c-4339-b494-b597da8fbb3b" >
Nanosecond-Pulsed P...
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Wang, WenyuHuazhong University of Science and Technology
(author)
Nanosecond-Pulsed Passively Q-Switched Fiber Laser by Using Photothermal Dynamics in a Dielectric Microcavity
- Article/chapterEnglish2023
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LIBRIS-ID:oai:research.chalmers.se:7957b3cc-e63c-4339-b494-b597da8fbb3b
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https://doi.org/10.1021/acsphotonics.3c00765DOI
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https://research.chalmers.se/publication/538030URI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
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Thermal nonlinear effects have been extensively studied in whispering-gallery optical microcavities. Photothermal effect originating from high light power buildup in the microcavities plays an important role in various applications, such as thermal tuning, thermal detection, and thermal imaging; however, they are often limited by the slow photothermal response time. Here, we demonstrate a nanosecond passively Q-switched fiber laser via photothermal dynamics in a dielectric microcavity and reveal the nanosecond-time-scale photothermal response in the microcavity. The passive Q-switched fiber laser is realized by a novel Q-switching mechanism, which is derived from the dynamic photothermal effect in an ultrahigh-quality silica microcavity. Q-switched pulses with a duration of 25.8 ns and a repetition rate of 653 kHz are achieved, and it indicates that the photothermal response time is far shorter than a microsecond, which is much faster than conventional thermo-optic switching based on dielectric photonic structures. We also provide rigorous theoretical analyses on the photothermal effect and generated Q-switched pulses, which agree well with the experimental results. Our work demonstrates a counterintuitive feature of the photothermal effect in a dielectric microcavity that paves the way to ultrafast thermo-optic switching and pulsed lasing.
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Xiao, BowenHuazhong University of Science and Technology
(author)
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Zhao, Ping,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)pingz
(author)
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Ren, LinhaoChina University of Geosciences, Wuhan,Huazhong University of Science and Technology
(author)
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Zhu, SongNanyang Technological University,Huazhong University of Science and Technology
(author)
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Shi, LeiHuazhong University of Science and Technology
(author)
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Zhang, XinliangHuazhong University of Science and Technology
(author)
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Huazhong University of Science and TechnologyChalmers tekniska högskola
(creator_code:org_t)
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In:ACS Photonics10:10, s. 3656-36632330-4022
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