Nonlinear Propagation in Optical Fiber Application

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

Deadline for manuscript submissions: closed (30 December 2023) | Viewed by 2984

Special Issue Editors

Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
Interests: photonic crystal fibers; vortex optics; polarization microscopy; nanophotonics

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Guest Editor
1. Russell Centre for Advanced Lightwave Science, Hangzhou Institute of Optics and Fine Mechanics, Chinese Academy of Science, Hangzhou 311421, China
2. Innovation and Integration Center of New Laser Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China
Interests: photonic crystal fibers; ultrafast fiber lasers; soliton dynamics

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Guest Editor
Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Interests: photonic crystal fibers; mode-locked fiber lasers; mid-IR ultrafast lasers; nonlinear optics

Special Issue Information

Dear Colleagues,

The invention of glass optical fibers in the 1960s has stimulated worldwide research and industrial applications ever since, initially in high-capacity telecommunications and later extended to high-energy transmission, optical sensing, biomedical imaging, etc. Three decades later, the advent of photonic crystal fibers, with their holey microstructures running along their length, revolutionized fiber optics and brought exciting new opportunities, especially in nonlinear optics due to the highly enhanced and controllable light–matter interactions. Practical applications are demanding higher performance and more flexible design from optical fibers for light propagation, for example, in their transmission band, optical loss, nonlinearity and dispersion engineering, and in applications ranging from novel lasers sources to optical communications. Therefore, optical fiber technologies need to address new challenges with deeper physical insight and better practical designs.

This Special Issue invites manuscripts that introduce recent advances in “Nonlinear Propagation in Optical Fiber Application”. All theoretical, numerical, and experimental studies are within the scope of this issue. Topics include but are not limited to the following:

  • Mode-locked fiber lasers;
  • Harmonic generation and phase matching techniques;
  • Supercontinuum generation and soliton dynamics;
  • Ultrashort pulses compression and propagation ;
  • Optical parametric amplification and applications;
  • Quantum effects: self- and cross-phase modulations and wave mixing;
  • Raman scattering and spectroscopy;
  • Brillouin scattering and distributed sensors;
  • Nonlinear effects in optical communications;
  • Highly nonlinear fibers and specialty fibers;
  • Progress in high-quality fiber optics, e.g., gratings, couplers, interferometers, etc.

Dr. Yang Chen
Prof. Dr. Wenbin He
Dr. Jiapeng Huang
Guest Editors

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Keywords

  • optical fibers
  • photonic crystal fibers
  • nonlinear optics
  • optical communications
  • fiber lasers
  • ultrashort pulses

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Published Papers (2 papers)

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11 pages, 755 KiB  
Article
Moving Bragg Solitons in a Dual-Core System Composed of a Linear Bragg Grating with Dispersive Reflectivity and a Uniform Nonlinear Core
by Tanvir Ahmed and Javid Atai
Photonics 2024, 11(4), 324; https://doi.org/10.3390/photonics11040324 - 30 Mar 2024
Viewed by 880
Abstract
The existence and stability of moving Bragg grating solitons are systematically investigated in a dual-core system, where one core is uniform and has Kerr nonlinearity, and the other is linear with Bragg grating and dispersive reflectivity. It is found that moving soliton solutions [...] Read more.
The existence and stability of moving Bragg grating solitons are systematically investigated in a dual-core system, where one core is uniform and has Kerr nonlinearity, and the other is linear with Bragg grating and dispersive reflectivity. It is found that moving soliton solutions exist throughout the upper and lower bandgaps, whereas no soliton solutions exist in the central bandgap. Similar to the quiescent solitons in the system, it is found that when dispersive reflectivity is nonzero, for certain values of parameters, sidelobes appear in the solitons’ profiles. The stability of the moving solitons is characterized using systematic numerical stability analysis. Additionally, the impact and interplay of dispersive reflectivity, soliton velocity, and group velocity on the stability border are analyzed. Full article
(This article belongs to the Special Issue Nonlinear Propagation in Optical Fiber Application)
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14 pages, 10833 KiB  
Article
Wavelet Decomposition Layer Selection for the φ-OTDR Signal
by Yunfei Chen, Kaimin Yu, Minfeng Wu, Lei Feng, Yuanfang Zhang, Peibin Zhu, Wen Chen and Jianzhong Hao
Photonics 2024, 11(2), 137; https://doi.org/10.3390/photonics11020137 - 31 Jan 2024
Cited by 4 | Viewed by 1537
Abstract
The choice of wavelet decomposition layer (DL) not only affects the denoising quality of wavelet denoising (WD), but also limits the denoising efficiency, especially when dealing with real phase-sensitive optical time-domain reflectometry (φ-OTDR) signals with complex signal characteristics and different noise [...] Read more.
The choice of wavelet decomposition layer (DL) not only affects the denoising quality of wavelet denoising (WD), but also limits the denoising efficiency, especially when dealing with real phase-sensitive optical time-domain reflectometry (φ-OTDR) signals with complex signal characteristics and different noise distributions. In this paper, a straightforward adaptive DL selection method is introduced, which dose not require known noise and clean signals, but relies on the similarity between the probability density function (PDF) of method noise (MN) and the PDF of Gaussian white noise. Validation is carried out using hypothetical noise signals and measured φ-OTDR vibration signals by comparison with conventional metrics, such as peak signal-to-noise ratio (PSNR) and structural similarity (SSIM). The proposed wavelet DL selection method contributes to the fast processing of distributed fiber optic sensing signals and further improves the system performance. Full article
(This article belongs to the Special Issue Nonlinear Propagation in Optical Fiber Application)
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