Design and experimental investigation of a 2.05µm single mode fiber coupler with high coupling efficiency

2010 ◽  
Author(s):  
Li Yan-chao ◽  
Wang Chun-hui ◽  
Gao Long ◽  
Cong Hai-fang ◽  
Qu Yang
Keyword(s):  
Experimental Investigation ◽  
Coupling Efficiency ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fiber Coupler

scholarly journals Experimental Research on Automatic Alignment and Control Algorithm of Spatial Light-Fiber Coupling

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Xizheng Ke ◽  
Benkang Yin
Keyword(s):  
Piezoelectric Ceramic ◽  
Low Cost ◽  
Coupling Efficiency ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Ceramic Fiber ◽  
Free Space Optical ◽  
Fiber Coupler ◽  
Automatic Alignment ◽  
Space Optical Communication

This study aims to solve the difficulties in the coupling between space light and single-mode fiber (SMF) in free-space optical communication. A fiber coupler based on two-dimensional (2D) piezoelectric ceramics was developed, which uses the stochastic parallel gradient descent (SPGD) algorithm to realize the automatic coupling of space light-SMF. In addition, a spatial light-SMF alignment experimentation platform was built indoors to verify the effectiveness and practicality of the 2D piezoelectric ceramic fiber coupler. The results show that the use of the SPGD algorithm can realize the automatic alignment of fiber position coupling, and the SMF coupling efficiency reaches 52.58% when the system is closed loop. 2D piezoelectric ceramic fiber couplers have unique advantages of low cost, simplified structure, and easy array expansion and can effectively solve the difficulty in the alignment of spatial light-SMF coupling. This study will serve as a significant reference for the research on spatial fiber-coupled array technology.

scholarly journals Coupling Characteristics of Fused Optical Fiber Coupler Formed with Single-Mode Fiber and Photonic Crystal Fiber Having Air Hole Collapsed Taper

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Hirohisa Yokota ◽  
Hirotomo Yashima ◽  
Yoh Imai ◽  
Yutaka Sasaki
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Extinction Ratio ◽  
Coupling Efficiency ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fiber Coupler ◽  
Crystal Fiber ◽  
Coupling Characteristics ◽  
Air Hole

Fused coupler forming with a single-mode fiber (SMF) and a photonic crystal fiber (PCF) is one of the solutions for optical coupling from a light source to a PCF. In this paper, we presented coupling characteristics of a fused fiber coupler formed with an ordinary SMF and a PCF having air hole collapsed taper. A prototype of SMF-PCF coupler with air hole collapsed taper was fabricated using CO2 laser irradiation. The coupling efficiency from SMF to PCF was −6.2 dB at 1554 nm wavelength in the fabricated coupler. The structure of the SMF-PCF coupler to obtain high coupling efficiency was theoretically clarified by beam propagation analysis using an equivalent model of the coupler with simplification. It was clarified that appropriately choosing the prestretched or etched SMF diameter and the length of air hole collapsed region was effective to obtain high coupling efficiency that was a result of high extinction ratio at cross port and low excess loss. We also demonstrated that the diameter of prestretched SMF to obtain high coupling efficiency was insensitive to the air hole diameter ratio to pitch of the PCF in the air hole collapsed SMF-PCF coupler.

Co-Axial, Double Waveguide Single-Mode Fiber Coupler

1987 ◽  
Author(s):  
S. Tammela ◽  
H. von Bagh ◽  
S. Honkanen ◽  
M. Leppihalme
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Fiber Coupler

Coupling efficiency of non-uniformly correlated beams into a single-mode fiber in turbulence (Invited)

2020 ◽  
Vol 49 (12) ◽  
pp. 20201049-20201049
Author(s):  
蔺淑琴 Shuqin Lin ◽  
张继前 Jiqian Zhang ◽  
朱新蕾 Xinlei Zhu ◽  
王飞 Fei Wang ◽  
蔡阳健 Yangjian Cai ◽  
...  
Keyword(s):  
Coupling Efficiency ◽  
Single Mode ◽  
Single Mode Fiber
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