Results 261 to 270 of about 344,166 (302)

Two-Mode Coupling Model in a Few Mode Fiber

Оптика и спектроскопия, 2013
A phenomenological two-mode coupling model in few mode fibers (FMF) is developed. It uses a mode coupling coefficient and the differential modal delay as the input parameters and the split-step approach. The model is consistent with the experimental results demonstrating distributed mode coupling effects in FMF and may be used for multipath ...
N. A. Kaliteevskiy, A. E. Korolev, K. S. Koreshkov, V. N. Nazarov, P. M. Sterlingov   +4 more
openaire   +1 more source

Mode Selective Conversion Enabled by the Long-Period Gratings Inscribed in Elliptical Core Few-Mode Fiber

Journal of Lightwave Technology, 2020
We demonstrate the fabrication of long-period fiber gratings (LPFGs) in an elliptical core few-mode fiber (e-FMF) by CO2 laser. The mode conversion from fundamental mode to high-order modes (LP11a, LP11b, and LP21a mode) can be realized by the LPFGs with
Zuyao Liu, Xinyi Zhao, C. Mou, Yunqi Liu
semanticscholar   +1 more source

A temperature sensor based on tapered few mode fiber long-period grating induced by CO2 laser and fusion tapering

, 2020
A temperature sensor based on tapered few mode fiber long-period grating is proposed, which is induced by CO2 laser and fusion tapering. Based on the coupling of LP01 and LP11 modes in few mode fiber, the influence of the grating period on resonant ...
Xinghu Fu, Yuepeng Zhang, Yufan Wang, G. Fu, W. Jin, W. Bi   +5 more
semanticscholar   +1 more source

Few-Mode Energy-Managed Soliton Fiber Laser

2025 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
We present an all-anomalous mode-locked laser architecture combining a few-mode gain fiber with single-mode passive fibers. This hybrid fiber laser generates high-energy pulses whose features are controlled by an intracavity spectral filter. Using a 1.7-nm filter bandwidth, the laser delivers 2.5-ps pulses of 39-nJ energy and 15.6-kW peak power ...
Mostafa I. Mohamed, Mincheng Tang, Aurélien Coillet, Vincent Couderc, Philippe Grelu   +4 more
openaire   +2 more sources

High-order mode conversion in a few-mode fiber via laser-inscribed long-period gratings at 1.55  µm and 2  µm wavebands.

Applied Optics, 2020
We demonstrate high-order mode conversion in a few-mode fiber (FMF) via CO2 laser inscribed long-period fiber gratings (LPFGs) at both the 1.55 µm and 2 µm wavebands.
Xinyi Zhao, Yunhe Zhao, Yunqi Liu, Zuyao Liu, C. Mou, Lei Shen, Lei Zhang, Jie Luo   +7 more
semanticscholar   +1 more source

A novel six-core few-mode fiber with low loss and low crosstalk

, 2020
A novel six-core few-mode fiber is proposed in this paper. The refractive index of each core is graded and pure silica is adopted in the center of each core. Four supermodes are achieved using full-vector finite element method in this fiber.
Yanlei Li, Xiao Wang, Zheng Hongjun, Xin Li, Chenglin Bai, Weisheng Hu, Liu Yang, Dong Qiuhuan   +7 more
semanticscholar   +1 more source

Simultaneous measurement of temperature and refractive index with F–P microcavity sensor based on graded-index few mode fiber

Optics Communications, 2020
In this paper, a Fabry–Perot (F–P) microcavity sensor based on graded-index few mode fiber is proposed and fabricated. One end of the graded-index few mode fiber is etched by hydrofluoric(HF) acid to form an air microcavity.
Xinghu Fu, Lian-xu Liu, Shu-Fan Huang, G. Fu, W. Jin, W. Bi   +5 more
semanticscholar   +1 more source

Wideband Intermodal Nonlinear Signal Processing With a Highly Nonlinear Few-Mode Fiber

IEEE Journal of Selected Topics in Quantum Electronics, 2020
Intermodal four-wave mixing can be exploited to perform nonlinear signal processing functionalities, such as all-optical wavelength conversion. Those functions can be used e.g.
G. Rademacher, R. Luís, B. Puttnam, Y. Awaji, Masatoshi Suzuki, T. Hasegawa, H. Furukawa, N. Wada   +7 more
semanticscholar   +1 more source

Panda type elliptical ring core few-mode fiber

, 2020
We present a new type of few-mode fiber which features an elliptical ring-core with two stress rods. This type of few-mode fiber can separate the adjacent modes from each other.
Weijun Song, Hongyao Chen, Jianping Wang, Changling Liu, Yijin Chen, Zizheng Li, Mei Liu   +6 more
semanticscholar   +1 more source

Mode coupling in few-mode large-mode-area fibers

SPIE Proceedings, 2014
We present an experimental study on mode coupling characteristics of few-mode large-mode-area (LMA) fibers, which are widely used in high power fiber lasers. The modal power allocation is measured by modal decomposition of the nearfield intensity profile of the output beam.
Changgeng Ye, Joona Koponen, Ville Aallos, Laeticia Petit, Ossi Kimmelma, Teemu Kokki   +5 more
openaire   +1 more source