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Smart Fiber Lasers

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: 20 May 2025 | Viewed by 2822

Special Issue Editor


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Guest Editor
Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: smart fiber lasers; intelligent optical communications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Benefitting from the exponential development of AI techniques, the study of smart fiber lasers, as a new research field, has grown rapidly in recent years owing to their salient performance enabled by intelligent laser design and optimization.

So far, diverse smart fiber lasers have been realized. In smart ultrafast fiber lasers, intelligent mode-locking and spectral programmability have been achieved. An intelligent spatial–temporal mode-lock fiber laser with various tunabilities has also been demonstrated. Smart fiber lasers have exhibited strengths in terms of emission performance, tunability, and stability. Furthermore, intelligent design and optimization methods can also find essential applications in other research fields related to fiber lasers, such as laser manufacturing, nonlinear optics, optical imaging, etc.

We are pleased to invite you to submit your original research articles and reviews to this Special Issue, " Smart Fiber Lasers," which will focus on the recent advances in smart fiber lasers and their applications. Research areas may include (but are not limited to) the following:

  • Smart fiber laser design
  • Smart fiber laser optimization
  • Smart nonlinear optics
  • Fiber laser applications involving intelligent techniques

Prof. Dr. Lilin Yi
Guest Editor

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 100 words) can be sent to the Editorial Office for announcement on this website.

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. Applied Sciences is an international peer-reviewed open access semimonthly 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

  • smart fiber laser
  • fiber laser design, optimization and applications
  • AI techniques
  • nonlinear optics

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Published Papers (2 papers)

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Research

10 pages, 1304 KiB  
Article
Theoretical Analysis on Active Polarization Control of Fiber Laser Based on Root Mean Square Propagation Algorithm
by Yifei Shi, Yunfeng Qi, Hui Shen, Zhao Quan and Ming Tang
Appl. Sci. 2024, 14(21), 9691; https://doi.org/10.3390/app14219691 - 23 Oct 2024
Viewed by 1213
Abstract
High-power linearly polarized fiber lasers are widely used in coherent beam combination, nonlinear frequency conversion, and gravitational wave detection. With the increase in output power, it is challenging for fiber lasers to maintain a high polarization extinction ratio (PER). Combined with intelligent techniques, [...] Read more.
High-power linearly polarized fiber lasers are widely used in coherent beam combination, nonlinear frequency conversion, and gravitational wave detection. With the increase in output power, it is challenging for fiber lasers to maintain a high polarization extinction ratio (PER). Combined with intelligent techniques, active polarization control is a prospective method to obtain the laser output with high PER and high stability. We demonstrate a comprehensive model of an active polarization control system. The root mean square propagation (RMS-Prop) algorithm is used to control the non-polarization-maintaining (non-PM) fiber laser to generate linearly polarized laser. The parameters of the RMS-Prop algorithm are theoretically analyzed, including cost function, perturbation amplitude, and global learning rate. The simulation results show that PER is the optimal cost function. When the perturbation amplitude is 0.06 and the global learning rate is 0.6, the system can achieve the optimal control speed and accuracy. By comparison with the stochastic parallel gradient descent (SPGD) algorithm, the RMS-Prop algorithm has an advantage in obtaining higher PER. Full article
(This article belongs to the Special Issue Smart Fiber Lasers)
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10 pages, 3327 KiB  
Article
A Theoretical and Experimental Analysis of the Time-Domain Characteristics of a PRBS Phase-Modulated Laser System
by Yun Zhu, Ying Li, Dong Li, Lin Dong, Xuesheng Liu, Anru Yan, Youqiang Liu and Zhiyong Wang
Appl. Sci. 2024, 14(20), 9198; https://doi.org/10.3390/app14209198 - 10 Oct 2024
Viewed by 1077
Abstract
Pseudo-Random Binary Sequence (PRBS) phase modulation is an effective method for suppressing the stimulated Brillouin scattering (SBS) effect generated by narrow-linewidth fiber lasers during amplification. We noticed that backward time-domain pulses were generated when using PRBS modulation signals in fiber amplification. In this [...] Read more.
Pseudo-Random Binary Sequence (PRBS) phase modulation is an effective method for suppressing the stimulated Brillouin scattering (SBS) effect generated by narrow-linewidth fiber lasers during amplification. We noticed that backward time-domain pulses were generated when using PRBS modulation signals in fiber amplification. In this paper, the time-domain dynamic characteristics of the forward output laser and the backward Stokes light after PRBS phase modulation were studied theoretically. Through analyzing the transient SBS three-wave coupling theory and combining it with the SBS accumulation time constant, we knew that the forward and backward high-intensity pulses were caused by the long dwell time of the PRBS. For this purpose, we provided a new method for suppressing high-intensity pulses caused by a long dwell time; namely, we modified the maximum length sequence (MLS) of PRBS signals to eliminate the long dwell time, took the PRBS-9 signal at 1 GHz as an example, and then used MLS1 modulation and MLS2 modulation to compare them with unoptimized PRBS modulation. The output laser peaks of the MLS1 and MLS2 signals were reduced from ±55% to ±25% and ±10% relative to the original PRBSs, respectively, and the peaks of Stokes light were reduced from 39% to 19% and 11%, respectively. Additionally, we experimentally verified that the rational optimization of the sequence did not reduce the SBS threshold. The results provided a new method for suppressing high-intensity pulses during the amplification of a PRBS phase-modulated laser, which played an important role in the output stability of high-power narrow-linewidth fiber amplifiers. Full article
(This article belongs to the Special Issue Smart Fiber Lasers)
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