Results 11 to 20 of about 318,441 (330)

Study on the Influence of Atmospheric Light Intensity Scintillation Effect on Optical Fiber Coupling Efficiency

Photonics
Light intensity flicker is the most basic and important effect of turbulence. Fiber coupling efficiency is the primary parameter that ensures the system’s communication quality.
Xiaoying Ding, Xin Zhao
doaj   +2 more sources

Experimental verification of fiber-coupling efficiency for satellite-to-ground atmospheric laser downlinks

Optics Express, 2012
Optical communication is a high-capacity method that can handle considerable satellite data. When common-fiber optical devices such as optical fiber amplifiers based on single mode fibers are used in free-space laser communication systems, the laser beam has to be coupled to a single-mode fiber.
Hideki, Takenaka, Morio, Toyoshima, Yoshihisa, Takayama   +2 more
openaire   +3 more sources

Enhancing fiber-coupling efficiency of beam-to-fiber links in turbulence by spatial non-uniform coherence engineering.

Optics Express, 2023
We present a general formula for the fiber-coupling efficiency of various types of non-uniformly correlated beams propagating in a turbulent atmosphere.
Zhiwen Yan, Ying Xu, Shuqing Lin, Hao Chang, Xinlei Zhu, Y. Cai, Jiayi Yu   +6 more
semanticscholar   +1 more source

Few-Mode Fiber Coupling Efficiency for Free-Space Optical Communication [PDF]

Journal of Lightwave Technology, 2020
Few-mode fiber is a significant component of free-space optical communication at the receiver to obtain achievable high coupling efficiency. A theoretical coupling model from the free-space optical communication link to a few-mode fiber is proposed based
Xingjie Fan, Dawei Wang, Julian Cheng, Jingkai Yang, Jing Ma   +4 more
semanticscholar   +1 more source

Enhanced fiber-coupling efficiency via high-order partially coherent flat-topped beams for free-space optical communications.

Optics Express, 2022
The fiber-coupling efficiency of signal beams is crucial in free space optical (FSO) communications. Herein, we derived an analytical expression for the fiber-coupling efficiency of partially coherent flat-topped beams propagating through atmospheric ...
Yangsheng Yuan, Jiqian Zhang, Junjie Dang, Wenjie Zheng, G. Zheng, Peng Fu, Jun Qu, B. Hoenders, Yuefeng Zhao, Y. Cai   +9 more
semanticscholar   +1 more source

Optical Coupling Efficiency of a Coupler with Double-Combined Collimating Lenses and Thermally Expanded Core Fibers

Micromachines, 2022
Improving the coupling efficiency of two optical signals is a hot issue, where the efficiency of optical coupling has a significant effect on the signal transmission over the fiber link.
Qi He, Zhengang Zhao, Xiaoda Ye, Chuan Luo, Dacheng Zhang, Sifei Wang, Xiaoping Xu   +6 more
doaj   +1 more source

Characteristic analysis of core radius, core refractive index, mismatched phase constant and coupling efficiency about 2 × 2 fiber directional coupler based on MATLAB

Results in Optics, 2022
When two parallel waveguides are close to each other, the power of the two adjacent waveguides will be periodically converted to form a directional coupled waveguide system ().
YuCheng Li, Yang Zhang, YongTian Li, YiFeng Wu   +3 more
doaj   +1 more source

Turbulence spectrum model and fiber-coupling efficiency in the anisotropic non-Kolmogorov satellite-to-ground downlink

, 2021
Increasing experimental and theoretical results have confirmed that the anisotropy of turbulence cells cannot be ignored in the atmospheric turbulence. The satellite-to-ground downlink is the important part of satellite optical communication network, so ...
Chao Zhai
semanticscholar   +1 more source

Efficient input and output fiber coupling to a photonic crystal waveguide [PDF]

Optics Letters, 2004
The efficiency of evanescent coupling between a silica optical fiber taper and a silicon photonic crystal waveguide is studied. A high reflectivity mirror on the end of the photonic crystal waveguide is used to recollect, in the backwards propagating fiber mode, the optical power that is initially coupled into the photonic crystal waveguide.
Barclay, Paul E., Srinivasan, Kartik, Borselli, Matthew, Painter, Oskar   +3 more
openaire   +3 more sources

The influence of training status, age, and muscle fiber type on cycling efficiency and endurance performance. [PDF]

, 2013
The purpose of this study was to assess the influence of age, training status, and muscle fiber-type distribution on cycling efficiency. Forty men were recruited into one of four groups: young and old trained cyclists, and young and old untrained ...
Wiles, J., Hopker, J., Coleman, Damian A, Jobson, Simon A., Gregson, Hannah C, Wiles, Jonathan, Coleman, D., Gregson, H., Coleman, Damian A., Hopker, James G., Passfield, L., von der Haar, Tobias, Passfield, Louis, Von der Haar, T., Jobson, S., Gregson, Hannah C.   +15 more
core   +1 more source