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Nanosecond-Pulsed P...
Nanosecond-Pulsed Passively Q-Switched Fiber Laser by Using Photothermal Dynamics in a Dielectric Microcavity
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- Wang, Wenyu (författare)
- Huazhong University of Science and Technology
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- Xiao, Bowen (författare)
- Huazhong University of Science and Technology
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- Zhao, Ping, 1986 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ren, Linhao (författare)
- China University of Geosciences, Wuhan,Huazhong University of Science and Technology
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- Zhu, Song (författare)
- Nanyang Technological University,Huazhong University of Science and Technology
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- Shi, Lei (författare)
- Huazhong University of Science and Technology
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- Zhang, Xinliang (författare)
- Huazhong University of Science and Technology
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(creator_code:org_t)
- 2023
- 2023
- Engelska.
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Ingår i: ACS Photonics. - 2330-4022. ; 10:10, s. 3656-3663
- Relaterad länk:
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- dielectric optical microcavity
- whispering-gallery mode
- pulsed fiber laser
- passive Q-switching
- photothermal dynamics
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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