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Photonics
Special Issues
Ultrafast Optics: From Fundamental Dynamics to Transformative Technologies
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Ultrafast Optics: From Fundamental Dynamics to Transformative Technologies

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: 15 January 2026 | Viewed by 2395

Special Issue Editors

Dr. Yizhou Liu

E-Mail Website
Guest Editor
School of Information Science and Engineering, Shandong University, Jinan 250100, China
Interests: Yb-doped fiber laser system; harmonic mode locking laser; Q-switching and mode-locking self-pulsing Er-doped fiber laser
Dr. Kong Gao

E-Mail
Guest Editor
School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
Interests: laser diodes; optics and lasers; laser technology

Special Issue Information

Dear Colleagues,

This Special Issue will focus on the emerging research results on fundamental dynamics and transformative technologies based on ultrafast optics. Developing ultrafast optics could significantly contribute to multiple fields of ultrafast laser machining, optical imaging, strong-field physics, and more. Therefore, many aspects need further investigation, including advanced optical performance, novel optical interactions, and new optical applications.

This Special Issue will cover a vast scope of research, including the fundamental dynamics of ultrafast optics and transformative technologies based on ultrafast optics; contributions will be solicited on topics including but not limited to the following areas:     

  • The fundamental dynamics of ultrafast optics;
  • Novel optical phenomena based on ultrafast optics;
  • The application of ultrafast optics;
  • Optical imaging based on ultrafast optics;
  • Strong-field physics based on ultrafast optics.

Dr. Yizhou Liu
Dr. Kong Gao
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ultrafast optics
  • ultrafast lasers
  • femtosecond dynamics
  • strong-field physics
  • nonlinear optics
  • ultrafast laser–matter interaction
  • optical imaging
  • novel optical interactions
  • advanced laser technologies

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

12 pages, 1245 KB  
Communication
Nonlinear Dynamics of Tetraphenylporphyrin and Dithiaporphyrin and Their Diacids via Pulse Trains with ps/ns Subpulse Widths
by Quan Miao, Erping Sun and Yan Xu
Photonics 2025, 12(12), 1223; https://doi.org/10.3390/photonics12121223 - 11 Dec 2025
Viewed by 150
Abstract
The nonlinear optical absorption of tetraphenylporphyrin (H2TPP) and dithiaporphyrin (DSP) and their diacids (H4TPP2+ and H2DSP2+) via pulse trains [...] Read more.
The nonlinear optical absorption of tetraphenylporphyrin (H2TPP) and dithiaporphyrin (DSP) and their diacids (H4TPP2+ and H2DSP2+) via pulse trains was studied. The subpulse widths of pulse trains were set as 30 ps and 5 ns according to experimental work. The dynamical absorption of pulse trains was studied by solving a paraxial field equation together with rate equations. The Crank–Nicholson numerical method was employed in numerical computation. In the weak energy region, neutral complexes H2TPP and DSP show lower energy transmittances than their diacids H4TPP2+ and H2DSP2+. And DSP with S-atoms shows the lowest transmittance. In the strong energy region, the energy transmittances of diacid complexes declines sharply. Thus H4TPP2+ shows the lowest transmittance among all complexes. Full article
(This article belongs to the Special Issue Ultrafast Optics: From Fundamental Dynamics to Transformative Technologies)
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11 pages, 2222 KB  
Article
Characterization of a 30 GHz Spaced Astro-Comb Filtered by a Fabry–Pérot Cavity in Vacuum
by Qi Zhou, Ruoao Yang, Fei Zhao, Gang Zhao, Aimin Wang, Xing Chen and Zhigang Zhang
Photonics 2025, 12(12), 1184; https://doi.org/10.3390/photonics12121184 - 30 Nov 2025
Viewed by 269
Abstract
We demonstrate a compact astro-comb with ~30 GHz line spacing covering the 560–900 nm range, seeded by a 1 GHz Yb:fiber laser frequency comb phase-locked to a rubidium clock for long-term frequency stability. The comb spacing is multiplied by a passively stabilized Fabry–Pérot [...] Read more.
We demonstrate a compact astro-comb with ~30 GHz line spacing covering the 560–900 nm range, seeded by a 1 GHz Yb:fiber laser frequency comb phase-locked to a rubidium clock for long-term frequency stability. The comb spacing is multiplied by a passively stabilized Fabry–Pérot cavity, which is vacuum-sealed (3.3 × 10−5 Pa) and temperature-controlled at 25 ± 0.05 °C, exhibiting a resonance linewidth of 80.56 MHz. Characterization using a high-resolution Fourier-transform spectrometer reveals sharp, evenly spaced comb lines with a maximum side-mode suppression ratio of 23.86 dB. The estimated radial velocity (RV) precision reaches ~63 cm/s, and further reduction in measurement noise is expected to achieve <10 cm/s precision, meeting the stringent requirements of next-generation astronomical spectrographs. Full article
(This article belongs to the Special Issue Ultrafast Optics: From Fundamental Dynamics to Transformative Technologies)
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9 pages, 1588 KB  
Communication
Sub-60 fs, 1300 nm Laser Pulses Generation from Soliton Self-Frequency Shift Pumped by Femtosecond Yb-Doped Fiber Laser
by Hongyuan Xuan, Kong Gao, Xingyang Zou, Ze Zhang, Wenchao Qiao and Yizhou Liu
Photonics 2025, 12(8), 802; https://doi.org/10.3390/photonics12080802 - 10 Aug 2025
Viewed by 1660
Abstract
We report on the generation of 1300 nm ultrashort laser pulses via the soliton self-frequency shift in a high-nonlinearity fiber, pumped by the 41.9 MHz, 67.9 fs, 1073 nm femtosecond laser emitted from an Yb-doped fiber laser system. A numerical simulation was applied [...] Read more.
We report on the generation of 1300 nm ultrashort laser pulses via the soliton self-frequency shift in a high-nonlinearity fiber, pumped by the 41.9 MHz, 67.9 fs, 1073 nm femtosecond laser emitted from an Yb-doped fiber laser system. A numerical simulation was applied to investigate the spectral broadening process driven by the soliton self-frequency shift with increased pump power. The experimental results are in good agreement with the numerical results, delivering a 33 mW, 57.8 fs 1300 nm Raman soliton filtered by a longpass filter. The impact of the polarization direction of the injected pump laser on the soliton self-frequency shift process was also further investigated. The root means squares of the Yb-doped fiber laser and the nonlinearly spectral broadened laser were 0.19%@1h and 0.23%@1h, respectively. Full article
(This article belongs to the Special Issue Ultrafast Optics: From Fundamental Dynamics to Transformative Technologies)
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