Results 51 to 60 of about 356 (134)

Application of machine learning for signal recognition in distributed fibre optic acoustic sensing technology

IET Optoelectronics, Volume 18, Issue 4, Page 81-95, August 2024.
The authors provide a comprehensive review of signal feature extraction and pattern recognition techniques applied in distributed acoustic sensing (DAS) technology. After introducing the fundamentals of DAS, specific applications are considered, and the following techniques have been analysed and compared: feature extraction algorithms based on wavelet
Yage Zhan, Lirui Liu, Kehan Li
wiley   +1 more source

Open Cavity Controllable Dual-Wavelength Hybrid Raman-Erbium Random Fiber Laser

IEEE Photonics Journal, 2019
This investigation demonstrates a simple open-ended controllable dual-wavelength random fiber laser based on hybrid amplification of the Raman and erbium-doped fiber (EDF).
Nadiah Husseini Zainol Abidin, Lau Kuen Yao, Muhammad Hafiz Abu Bakar, Nizam Tamchek, Mohd Adzir Mahdi   +4 more
doaj   +1 more source

Development of a portable and cost‐effective femtosecond fibre laser synchronizable with synchrotron X‐ray pulses

Journal of Synchrotron Radiation, Volume 31, Issue 4, Page 821-828, July 2024.
This study introduces a compact, portable femtosecond fibre laser system optimized for synchronization with SPring‐8 synchrotron X‐ray pulses in a uniform filling mode, offering a practical and cost‐effective alternative to traditionally, fixed, installed laser systems for time‐resolved spectroscopy combining synchrotron X‐ray pulses and laser pulses ...
Keisuke Kaneshima, Takumi Kyoda, Shuta Sugeta, Yoshihito Tanaka   +3 more
wiley   +1 more source

Multistability manipulation by reinforcement learning algorithm inside mode‐locked fiber laser

Nanophotonics, Volume 13, Issue 16, Page 2891-2901, July 2024.
Abstract Fiber mode‐locked lasers are nonlinear optical systems that provide ultrashort pulses at high repetition rates. However, adjusting the cavity parameters is often a challenging task due to the intrinsic multistability of a laser system. Depending on the adjustment of the cavity parameters, the optical output may vary significantly, including Q ...
Alexey Kokhanovskiy, Evgeny Kuprikov, Kirill Serebrennikov, Aram Mkrtchyan, Ayvaz Davletkhanov, Alexey Bunkov, Dmitry Krasnikov, Mikhail Shashkov, Albert Nasibulin, Yuriy Gladush   +9 more
wiley   +1 more source

Dielectric‐Metasurface‐Enhanced Kerr Self‐Modulation for Passively Q‐Switching

Laser &Photonics Reviews, Volume 18, Issue 4, April 2024.
By exploiting the enhanced Kerr effect from a periodic array of silicon nanodisks, the Mie resonance of the unit cells enhances is redshifted, achieving a novel transmission modulation for pulsed laser generation. And a stable Q‐switched pulse laser output with a duration of 1.4 µs and a repetition rate of 60 kHz is achieved.
Pu Sun, Yuwei Sun, Haolin Yang, Xinan Xu, Yi Jin, Sailing He   +5 more
wiley   +1 more source

Efficient and Compact Optical Amplifier Using EYDF

International Islamic University Malaysia Engineering Journal, 2010
An efficient Erbium/Ytterbium doped fiber amplifier (EYDFA) is demonstrated using a 1058nm pumping wavelength, where the amplification is assisted by energy transfer between Yb and Er ions.
Sulaiman Wadi Harun, K. Dimyati, M. R. Tamjis, S. Z. Muhd-Yassin, M. K. Abd-Rahman, H. Ahmad   +5 more
doaj   +1 more source

Half-linear cavity multiwavelength Brillouin-erbium fiber laser [PDF]

Journal of the European Optical Society-Rapid Publications, 2014
Multiwavelength half-linear cavity Brillouin erbium fiber laser (BEFL) has been demonstrated. The half-linear cavity BEFL is formed by utilizing only two circulators: one circulator acts as input and output ports and the other circulator is used to form ...
Al-Alimi A.W., Yaacob M. H., Abas A. F.
doaj   +1 more source

Enhanced Thermal Stability in Compact ASE Sources Enabled by Optimized Erbium-Doped Fiber Design

Photonics
Amplified Spontaneous Emission (ASE) sources are widely employed as highly stable broadband sources in fields such as high-precision navigation and optical detection.
Jianming Liu, Wenbin Lin, Wei Liu, Jinjuan Cheng, Chengcheng He, Wei Xu, Jia Guo   +6 more
doaj   +1 more source

Feedback-Injected Erbium Fiber Laser With Selectable Tunability and Constant Single-Longitudinal-Mode Characteristic

IEEE Access, 2020
In this investigation, a wavelength-selected single-longitudinal-mode (SLM) erbium-doped fiber (EDF) ring laser utilizing C-band EDF based gain medium over a tuning bandwidth of 1524.0 to 1573.0 nm is demonstrated experimentally.
Chien-Hung Yeh, Wei-Yao You, Jhao-Ren Chen, Wen-Piao Lin, Chi-Wai Chow   +4 more
doaj   +1 more source

A Selectable Single-Mode Erbium Laser With Power-Flattened Output Employing Dual-Sagnac-Ring

IEEE Access, 2019
To achieve wavelength-selectable and stable erbium-doped fiber (EDF) laser, a dual-Sagnac-ring configuration is designed to reach single-longitudinal-mode (SLM) oscillation and power-flattened output simultaneously.
Chien Hung Yeh, Wen-Piao Lin, Yao-Jen Chang, Yue-Ru Xie, Chien-Ming Luo, Chi-Wai Chow   +5 more
doaj   +1 more source