Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
3.9
2.1
Journals
Photonics
Special Issues
Lasers and Complex System Dynamics
share announcement

Lasers and Complex System Dynamics

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Lasers, Light Sources and Sensors".

Deadline for manuscript submissions: 31 December 2026 | Viewed by 3862

Editors

Prof. Dr. Juan Hugo García-López

E-Mail Website
Guest Editor
Optics, Complex Systems and Innovation Laboratory, Centro Universitario de los Lagos, Universidad de Guadalajara, Enrique Díaz de León 1144, Colonia Paseos de la Montaña, Lagos de Moreno 47463, Mexico
Interests: photonics; optics and photonics; optoelectronics; fiber optics; photonic; fibers; nonlinear fiber; optics nonlinear
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Rider Jaimes-Reátegui

E-Mail Website
Guest Editor
Optics, Complex Systems, and Innovation Laboratory, Centro Universitario de los Lagos, Universidad de Guadalajara, Enrique Díaz de León 1144, Jalisco, Lagos de Moreno 47463, Mexico
Interests: nonlinear dynamics and complex systems
Prof. Dr. Guillermo Huerta Cuellar

E-Mail Website
Guest Editor
Centro Universitario de Los Lagos (CULAGOS), Universidad de Guadalajara, Guadalajara 44100, Mexico
Interests: nonlinear dynamical systems; numerical modeling; laser dynamics; chaos theory; deterministic Brownian motion; fractional calculus
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The field of photonics has long regarded lasers as exemplary systems for exploring nonlinear dynamics, instabilities, and coherence phenomena. However, beyond their well-known behaviors, modern laser systems increasingly exhibit features typical of complex systems: multi-scale interactions, self-organization, emergent behaviors, and sensitivity to initial or boundary conditions. These characteristics are especially prominent in high-gain systems, laser networks, coupled resonators, and light–matter interactions in structured environments.

This Special Issue is dedicated to exploring the intersection between laser physics and the science of complex dynamical systems. We welcome contributions that take both theoretical and experimental perspectives, covering topics such as chaos, pattern formation, bifurcation theory, synchronization, cavity solitons, and topological photonics. By framing lasers within the broader landscape of complexity science, this issue aims to foster a multidisciplinary dialogue across nonlinear optics, applied physics, control theory, and systems engineering.

Dr. Juan Hugo García-López
Prof. Dr. Rider Jaimes-Reátegui
Prof. Dr. Guillermo Huerta Cuellar
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-anonymized 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

  • laser dynamics
  • nonlinear optics
  • complex systems
  • spatio-temporal chaos
  • self-organization
  • synchronization
  • cavity solitons
  • laser networks
  • photonic instabilities
  • emergent behavior

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

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

Published Papers (6 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

15 pages, 13343 KB  
Article
High-Stability Actively Mode-Locked Fiber Lasers Based on DFB-LD Injection Locking with F-P Frequency Stabilization
by Ju Wang, Manyun Liu, Hao Luo, Xingmiao Li, Xuemin Su, Chuang Ma and Jinlong Yu
Photonics 2026, 13(8), 771; https://doi.org/10.3390/photonics13080771 - 15 Aug 2026
Viewed by 43
Abstract
A high-stability actively mode-locked fiber laser (AMLFL) is proposed and experimentally demonstrated. This AMLFL is based on a distributed feedback laser diode (DFB-LD) injection locking with Fabry-Perot (F-P) etalon frequency stabilization. In this system, a wavelength modulation method is employed to generate the [...] Read more.
A high-stability actively mode-locked fiber laser (AMLFL) is proposed and experimentally demonstrated. This AMLFL is based on a distributed feedback laser diode (DFB-LD) injection locking with Fabry-Perot (F-P) etalon frequency stabilization. In this system, a wavelength modulation method is employed to generate the feedback signal for frequency stabilization. The stabilization mechanism utilizes the linear response characteristic of the first-order derivative of the F-P etalon transmission peak. This achieves wavelength stabilization of the DFB-LD. Subsequently, the stabilized light source is injected into the ring cavity of the AMLFL. The proposed system does not require modification to the existing AMLFL cavity. It also features a simple structure and low implementation cost. Experimental results show that, with frequency stabilization, the wavelength drift of a selected spectral line is reduced to within the 10 pm resolution of the OSA. Meanwhile, the standard deviations of the 5 GHz spectral component power fluctuation and the average output optical pulse power are 0.01 dB and 0.01 dB, respectively. Full article
(This article belongs to the Special Issue Lasers and Complex System Dynamics)
►▼ Show Figures

Figure 1

13 pages, 6030 KB  
Article
Femtosecond Laser Machining of Irregularly Shaped Film Cooling Holes: The Influence of Defocus Distance
by Zhen Wang, Junjie Xu, Lifei Wang and Zhen Zhang
Photonics 2026, 13(8), 769; https://doi.org/10.3390/photonics13080769 - 15 Aug 2026
Viewed by 120
Abstract
Film cooling holes are critical cooling structures that enhance the temperature-bearing capacity of turbine blades. Irregularly shaped holes, such as laidback fan-shaped holes (LFSHs), have been demonstrated to exhibit superior cooling performance compared to traditional circular holes. However, the complex shapes and structures [...] Read more.
Film cooling holes are critical cooling structures that enhance the temperature-bearing capacity of turbine blades. Irregularly shaped holes, such as laidback fan-shaped holes (LFSHs), have been demonstrated to exhibit superior cooling performance compared to traditional circular holes. However, the complex shapes and structures pose significant challenges for femtosecond laser processing. Due to the extremely limited reports available, the dependency of femtosecond laser processing on the formation of irregularly shaped holes has not yet been well understood. In this paper, the fabrication process of the LFSH expansion sections and the influence of defocus distance are discussed in detail. By systematically characterizing the surface micro- and nanostructures, three-dimensional topography, and roughness of the expansion sections, the processing differences under positive defocus, zero defocus, and negative defocus are compared. The formation mechanisms of the micro-hole structures on the expansion sections under positive defocus and zero defocus are elaborated by incrementally increasing the number of processing cycles. Under negative defocus, only a smooth honeycomb-like structure forms on the surface of the expansion section, yielding the highest surface quality. Under different processing times, the roughness under negative defocus can be reduced by up to 84.8% and 95.8% compared to zero defocus and positive defocus, respectively. Furthermore, a correlation between the surface micro-hole structure and the edge structure of the hole walls is established. Full article
(This article belongs to the Special Issue Lasers and Complex System Dynamics)
►▼ Show Figures

Figure 1

8 pages, 2266 KB  
Communication
Q-Switched Pulse Generation in a Multicore Fiber Laser with a Femtosecond-Laser-Inscribed FBG Array
by Alexey G. Kuznetsov, Alexander V. Dostovalov and Sergey A. Babin
Photonics 2026, 13(7), 612; https://doi.org/10.3390/photonics13070612 - 25 Jun 2026
Viewed by 353
Abstract
A Q-switched pulsed laser based on a coupled 7-core Yb-doped fiber with a cavity based on a fiber Bragg grating array has been demonstrated with a maximum energy of microsecond pulses up to 15 μJ at a 1 kHz repetition rate. The lasing [...] Read more.
A Q-switched pulsed laser based on a coupled 7-core Yb-doped fiber with a cavity based on a fiber Bragg grating array has been demonstrated with a maximum energy of microsecond pulses up to 15 μJ at a 1 kHz repetition rate. The lasing spectrum is hybridized so that the laser line maxima of each core are nearly the same, having a negligible spread relative to each other, which is much lower than the wavelength shifts between individual FBGs in the cores. At the same time, the generated power is nearly the same in all the cores. However, when increasing the power beyond the stimulated Raman scattering threshold, the supermodes are destroyed so that the spectra in the cores become increasingly different and less stable, and the output power is mainly concentrated in one of the cores, whereas the pulse shortens significantly to a sub-microsecond duration (300 ns), with damped oscillations appearing at the beginning. The new regimes we demonstrated of the multicore fiber laser are promising for creating powerful pulsed radiation sources with a narrow spectrum. Full article
(This article belongs to the Special Issue Lasers and Complex System Dynamics)
►▼ Show Figures

Figure 1

12 pages, 1540 KB  
Article
Four-Sided Symmetrical Transversely Pumped Model for Diode-Pumped Rare Gas Lasers
by Hongyu Liu, Donglin Ma and Hanyuan Chen
Photonics 2025, 12(12), 1150; https://doi.org/10.3390/photonics12121150 - 24 Nov 2025
Cited by 1 | Viewed by 644
Abstract
Diode-pumped rare gas lasers (DPRGLs) have attracted significant attention as potential high-power laser sources. This paper proposes a four-sided transverse pumping scheme to address the energy concentration degree limitations in existing side-pumped DPRGL configurations while reducing dependence on high-power narrow-linewidth pump sources. A [...] Read more.
Diode-pumped rare gas lasers (DPRGLs) have attracted significant attention as potential high-power laser sources. This paper proposes a four-sided transverse pumping scheme to address the energy concentration degree limitations in existing side-pumped DPRGL configurations while reducing dependence on high-power narrow-linewidth pump sources. A two-dimensional model was developed and validated through comparison between simulation results and experimental data. This study systematically investigated several key factors influencing output distribution through numerical simulations. The results demonstrate that the four-sided pumping approach provides an effective pathway for developing high-power DPRGL systems. Full article
(This article belongs to the Special Issue Lasers and Complex System Dynamics)
►▼ Show Figures

Figure 1

14 pages, 5330 KB  
Article
Prediction of Shock Wave Velocity Temporal Evolution Induced by Ms-Ns Combined Pulse Laser Based on Attention-LSTM
by Jingyi Li, Rongfan Liang, Junjie Liu and Jingdong Sun
Photonics 2025, 12(10), 1040; https://doi.org/10.3390/photonics12101040 - 21 Oct 2025
Viewed by 717
Abstract
This study systematically examined shock wave velocity induced by millisecond–nanosecond combined-pulse laser (ms–ns CPL) at a fixed ns laser energy density of 6 J/cm2, exploring the effects of varying pulse delays of 0 to 3 ms and ms laser energy densities [...] Read more.
This study systematically examined shock wave velocity induced by millisecond–nanosecond combined-pulse laser (ms–ns CPL) at a fixed ns laser energy density of 6 J/cm2, exploring the effects of varying pulse delays of 0 to 3 ms and ms laser energy densities of 226.13 J/cm2, 301 J/cm2 and 376.89 J/cm2. The temporal evolution of shock wave velocity induced by varying laser parameters was predicted by an attention mechanism-based long short-term memory algorithm (Attention-LSTM). The dependence between laser parameters and the evolution of shock wave velocity was captured by the LSTM layer. An attention mechanism was utilized to adaptively increase the weights of important time points during the propagation of the shock wave, thereby improving prediction accuracy. The experimental data corresponding to ms laser energy densities of 226.13 J/cm2 and 301 J/cm2 were set as the training set. The ms laser energy density of 376.89 J/cm2 experimental data was set as test set to evaluate the generalization ability of the model under unknown ms laser energy. The results indicate that when ms laser energy density is 376.8 J/cm2, the pulse delay is 2.2 ms. The shock wave velocity induced by the CPL increased by 50.77% compared with that induced by a single ns laser. The proposed Attention-LSTM model effectively predicts the evolutionary characteristics of shock wave velocity. The mean absolute error (MAE), root mean square error (RMSE), mean bias error (MBE) and the correlation coefficient (R2) of the test set are 7.65, 9.01, 1.47 and 0.98, respectively. This study provides a new data-driven approach for predicting the shock wave behavior induced by combined laser parameters and provides valuable guidance for optimizing laser process parameter combinations. Full article
(This article belongs to the Special Issue Lasers and Complex System Dynamics)
►▼ Show Figures

Figure 1

16 pages, 25234 KB  
Article
Real-Time Observer and Neuronal Identification of an Erbium-Doped Fiber Laser
by Daniel Alejandro Magallón-García, Didier López-Mancilla, Rider Jaimes-Reátegui, Juan Hugo García-López, Guillermo Huerta-Cuellar and Luis Javier Ontañon-García
Photonics 2025, 12(10), 955; https://doi.org/10.3390/photonics12100955 - 26 Sep 2025
Cited by 1 | Viewed by 1021
Abstract
This paper presents the implementation of a real-time nonlinear state observer applied to an erbium-doped fiber laser system. The observer is designed to estimate population inversion, a state variable that cannot be measured directly due to the physical limitations of measurement devices. Taking [...] Read more.
This paper presents the implementation of a real-time nonlinear state observer applied to an erbium-doped fiber laser system. The observer is designed to estimate population inversion, a state variable that cannot be measured directly due to the physical limitations of measurement devices. Taking advantage of the fact that the laser intensity can be measured in real time, an observer was developed to reconstruct the dynamics of population inversion from this measurable variable. To validate and strengthen the estimate obtained by the observer, a Recurrent Wavelet First-Order Neural Network (RWFONN) was implemented and trained to identify both state variables: the laser intensity and the population inversion. This network efficiently captures the system’s nonlinear dynamic properties and complements the observer’s performance. Two metrics were applied to evaluate the accuracy and reliability of the results: the Euclidean distance and the mean square error (MSE), both of which confirm the consistency between the estimated and expected values. The ultimate goal of this research is to develop a neural control architecture that combines the estimation capabilities of state observers with the generalization and modeling power of artificial neural networks. This hybrid approach opens up the possibility of developing more robust and adaptive control systems for highly dynamic, complex laser systems. Full article
(This article belongs to the Special Issue Lasers and Complex System Dynamics)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-6
Back to TopTop