Article
Engineering, Electrical & Electronic
Alicja Anuszkiewicz, Marcin Franczyk, Dariusz Pysz, Filip Wlodarczyk, Adam Filipkowski, Ryszard Buczynski, Tomasz Osuch
Summary: We have developed a silica-based large mode area fiber with a nanostructured core for use in fiber laser cavities. Our experimental results demonstrate that the fiber operates in single mode with low bending loss. We have also successfully fabricated high reflectivity UV induced fiber Bragg gratings and utilized them in a fiber laser setup. The flexibility of the nanostructuring approach holds promise for the development of passive fiber components that can be matched with any type of active fibers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Obstetrics & Gynecology
Massimo Candiani, Stefano Ferrari, Ludovica Bartiromo, Matteo Schimberni, Iacopo Tandoi, Jessica Ottolina
Summary: The study found that CO2 laser treatment for endometriomas is comparable to cystectomy in terms of pregnancy rates and in vitro fertilization outcomes, suggesting that CO2 laser may be a viable alternative to cystectomy.
JOURNAL OF MINIMALLY INVASIVE GYNECOLOGY
(2021)
Article
Chemistry, Analytical
Yang Liu, Tao Wu, Qiang Wu, Weidong Chen, Chenwen Ye, Mengyu Wang, Xingdao He
Summary: The laser frequency-locked hollow waveguide (HWG) gas sensor demonstrated simultaneous measurements of three isotopologues with enhanced accuracy and precision under the frequency locking condition. This study showcases the high potential of a novel human breath diagnostic sensor for medical diagnostic with high accuracy, precision, and sensitivity.
ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
Marcin Franczyk, Dariusz Pysz, Ryszard Stepien, Jaroslaw Cimek, Rafal Kasztelanic, Fang Lin Chen, Mariusz Klimczak, Luming Zhao, Ivan Kasik, Pavel Peterka, Ryszard Buczynski
Summary: We present the experimental verification of a new type of active nanostructured fiber that can emit laser at two wavelengths simultaneously. The fiber core is made of nanorods doped with Yb3+ or co-doped with Yb3+/Er3+ ions, allowing control of relative gain and modal properties. The double-cladding fiber structure enables efficient excitation with a single pump laser, and a high-quality beam is generated. The laser operation was successfully demonstrated at output power levels of 0.78 W and 0.42 W at 1040 nm and 1534 nm, respectively.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yang You, Gang Bai, Xingxing Zou, Xuewen Li, MengQi Su, Hanbin Wang, Zhao Quan, Meizhong Liu, Jingpu Zhang, Qiurui Li, Hui Shen, Yunfeng Qi, Bing He, Jun Zhou
Summary: The study demonstrated a mode-controllable fiber laser system with an output power of 1.4 kW. Mode conversion from LP11 to LP01 was achieved with high efficiency using the stochastic parallel-gradient descent algorithm. The system showcased maximum output powers for LP11 and LP01 modes, along with their respective slope efficiencies.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Andrey B. Petrov, Grigory A. Mikhailovsky, Alexander Gorbatchev, Maxim A. Odnoblyudov, Joona Rissanen, Valery N. Filippov, Regina Gumenyuk
Summary: This article experimentally demonstrates the highest spectral brightness for the pulsed fiber lasers in a compact high power and pulse energy laser system using a DFB laser diode and a T-DCF amplifier. The narrow linewidth system based on a DFB laser diode and a T-DCF amplifier proves to be an excellent and robust solution for material processing and Raman spectroscopy.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Alexander Kharakhordin, Andrey Rybaltovsky, Sergei Popov, Dmitry Ryakhovskiy, Fedor Afanasiev, Sergey Alyshev, Aleksandr Khegai, Mikhail Melkumov, Elena Firstova, Yuri Chamorovsky, Andrey Umnikov, Denis Lipatov, Sergei Firstov
Summary: A narrow-linewidth bismuth-doped fiber laser (BDFL) with random cavity and operational wavelength at 1.67 μm was demonstrated. The laser cavity was formed by an array of weakly reflecting fiber Bragg gratings inscribed in the active fiber core directly during the fiber drawing process. The laser behavior was studied in various configurations, and it was found that the laser wavelength can vary within the spectral range of 1.669-1.674 μm depending on the length and ambient temperature of the active fiber.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Xu-Bin Lin, Yu-Xin Gao, Jin-Gan Long, Jia-Wen Wu, Wei-Yi Hong, Hu Cui, Zhi-Chao Luo, Wen-Cheng Xu, Ai-Ping Luo
Summary: This study introduces an all few-mode fiber figure-eight laser STML by a nonlinear amplifying loop mirror at 1.0 μm, capable of generating single and multiple pulses at different central wavelengths. Various types of bound-state solitons were also achieved, contributing to a better understanding of the nonlinear characteristics of STML fiber lasers and their potential applications in optical communications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Qun Gao, Yueqing Du, Zhiwen He, Dong Mao, Jianlin Zhao
Summary: This study demonstrates a hybrid-structure fiber laser consisting of SMF and FMF, capable of delivering stable near-chirp-free solitons for various applications. The experimental results validate the superior performance of the laser and highlight its significant research potential.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Hongdan Wan, Yao Lu, Zhongwei Liang, Zhanyu Shen, Ping Gu, Taozheng Hu, Jing Chen
Summary: In this study, a tunable fiber laser based on a high-Q hybrid microcavity is proposed and demonstrated. The hybrid microcavity is fabricated by coating a TiO2 film with varied thickness on the surface of a SiO2 microsphere using atomic layer deposition. The fiber laser achieves tunable single-wavelength output with a narrow bandwidth of about 16.20 pm, high signal-to-noise ratio of about 40 dB, and a wavelength tuning range of about 220 pm. This novel tunable fiber laser has potential applications in optical communication and sensing.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Bing Han, Han Wu, Yang Liu, Shisheng Dong, Yunjiang Rao, Zinan Wang, Jiangming Xu, Lingmei Ma
Summary: Random fiber laser (RFL) utilizing stimulated Raman scattering and distributed random Rayleigh backscattering in fiber as optical gain and feedback mechanisms has been rapidly developed. By using a high-order pump and new transmission fiber with lower transmission loss, Rayleigh backscattering coefficient, and Raman gain coefficient, the length limits of random fiber lasing and sensing can be broken. A 200 km ultralong single-ended RFL and sensor are experimentally demonstrated, which are the longest single-ended RFL and sensor with functional remote reflectors reported to date. The proposed combination of high-order random lasing and ULLF with EDF can extend the working distance of various fiber sensing systems for safety monitoring of ultralong infrastructures.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Jian Zhou, Shuchang Gu, Zikai Chen, Bowen Lou, Yuyuan Jiang, Junqing Zhao, Lei Li, Dingyuan Tang, Deyuan Shen, Lei Su, Luming Zhao
Summary: The study demonstrates the shedding of scalar soliton rains from vector square-wave noise-like pulses in a fiber laser system, through the use of microfiber-knot-resonator (MKR). The MKR-induced energy transferring effect results in the co-existence of scalar and vector pulses, enriching the dynamics of optical pulses and extending the applications of MKR to pulse manipulations.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Duarte Viveiros, Jose Manuel Marques Martins de Almeida, Luis Coelho, Helena Vasconcelos, Joao M. Maia, Vitor A. Amorim, Pedro A. S. Jorge, Paulo V. S. Marques
Summary: A detailed study was conducted on turn around point long period fiber gratings with coupling to asymmetric cladding modes, fabricated using femtosecond laser direct writing. The fabrication process, coating with TiO2 film, and necessary corrections to achieve TAP condition with optimized sensitivity to the surrounding refractive index were discussed. LPFGs were coated with different thicknesses of TiO2 film and analyzed for wavelength sensitivity, showing maximum sensitivity when coated with a 30 nm thick film.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Aerospace
V. P. Efremov, A. D. Kiverin
Summary: This paper considers a set of models to describe the mechanism of ultra fast plasma propagation in silicon dioxide waveguides under intense laser pulses. It analyzes the paths of energy absorption and for the first time takes into account the absorption in the region ahead of the primary plasma front related to medium fracture by shock waves. The results show that this effect defines the speed of the absorption wave, and the competition between energy absorption and momentum losses due to transverse expansion defines oscillations in the speed of the absorption wave.
Article
Engineering, Electrical & Electronic
Bing Lv, Wentao Zhang, Wenzhu Huang, Fang Li
Summary: A low frequency-noise ring random fiber laser (RFL) based on random Bragg grating array (RBGA) feedback is proposed. The dual-cavity fiber Bragg grating Fabry-Perot (FBG-FP) filter is specially designed to suppress frequency jitter and undesired random lasing modes, achieving stable laser output and reduced frequency noise.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)