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.

Research on Coupler of Single Mode Fiber with Photonic Crystal Fiber

2014 ◽  
Vol 596 ◽  
pp. 826-829
Author(s):  
Qing Song Wei ◽  
Zhe Chen ◽  
Yun Han Luo ◽  
Yue Ma ◽  
Xiao Li He ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Reference Method ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Coupling Method ◽  
Coupling Ratio ◽  
Polarization Dependent Loss ◽  
Fiber Coupler ◽  
Crystal Fiber

A coupler of single mode fiber with photonic crystal fiber with a coupling ratio of 0 to 90% was fabricated with a new method called Auto-deposition Fused Side-adhere. A model for coupler of side-polished single mode fiber with side-polished photonic crystal fiber was established which proves it feasible to make such a coupler practically. In the range of 1520~1620nm, the Wavelength Dependent Loss (WDL) of the through port was 0.3dB and of the coupled port was 5dB. The Polarization Dependent Loss of through port was 0.25dB and 0.31dB at 1310nm and 1550nm, and the WDL of coupled port was 1.46dB and 1.75dB. When temperature changed from 10°C to 80°C and humidity changed from 10% to 70%, coupling ratio changed about 7% to 16%. It can be concluded that a steady coupler of single mode fiber with photonic crystal fiber can be made with the Auto-deposition Fused Side-adhere Coupling method, which can give a reference method and lay an experimental foundation for the fabrication of photonic crystal fiber coupler.

scholarly journals Pressure-assisted low-loss fusion splicing between photonic crystal fiber and single-mode fiber

2012 ◽  
Vol 20 (22) ◽  
pp. 24465 ◽  
Author(s):  
Tao Zhu ◽  
Fufeng Xiao ◽  
Laicai Xu ◽  
Min Liu ◽  
Ming Deng ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Low Loss ◽  
Crystal Fiber

Low Loss Fusion Splicing of Germanium Doped Core Photonic Crystal Fiber and Standard Single Mode Fiber

2010 ◽  
Vol 37 (6) ◽  
pp. 1589-1593
Author(s):  
李宏雷 Li Honglei ◽  
娄淑琴 Lou Shuqin ◽  
郭铁英 Guo Tieying ◽  
王立文 Wang Liwen ◽  
陈卫国 Chen Weiguo ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Low Loss ◽  
Crystal Fiber

High Extinction-Ratio Polarizing Endlessly Single-Mode Photonic Crystal Fiber

2007 ◽  
Vol 19 (8) ◽  
pp. 562-564 ◽  
Author(s):  
M. Delgado-Pinar ◽  
A. Diez ◽  
J. L. Cruz ◽  
M. V. Andres
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Extinction Ratio ◽  
Single Mode ◽  
Crystal Fiber ◽  
High Extinction Ratio

Photonic Crystal Fiber Sensor for Blood with Different Concentration of Zinc

2020 ◽  
Vol 1002 ◽  
pp. 290-299
Author(s):  
Raghad Hani ◽  
Bushra R. Mahdi ◽  
Ayad Z. Mohammad
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Optical Fibers ◽  
Human Blood ◽  
Zinc Concentration ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Concentration Change ◽  
Crystal Fiber ◽  
Output Laser

Zinc is one of the important material in human blood because of its effect in defensive system work for properly and it plays an important role in growth, wound healing Medically zinc concentration effect directly in skin health so it's important to make a sensor for discover zinc and its concentration change in human blood for each of male and female. Optical fibers are used as a sensor for detecting zinc and its concentration by transmitted laser signal through the optical fiber by using different types (single mode fiber SMF, photonic crystal fiber PCF) by studying the results of output laser the detection can be seen for zinc concentration change, the design of small PCF which the same LMA_10 but smaller in its radius of core and cladding even the distance between cores. The smallest PCF size has the best detection for all zinc concentration change in blood all that was done by comsol Multiphysics 5.4 simulation program

NUMERICAL COMPARISON OF MULTI-PUMP RAMAN AMPLIFIERS BASED ON PHOTONIC CRYSTAL FIBER AND STANDARD SINGLE MODE FIBER

2007 ◽  
Vol 21 (02n03) ◽  
pp. 115-122
Author(s):  
TAO SHANG ◽  
JIANPING CHEN ◽  
XINWAN LI ◽  
JUNHE ZHOU
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
High Gain ◽  
Gain Medium ◽  
Single Mode Fiber ◽  
Numerical Comparison ◽  
Raman Gain ◽  
Crystal Fiber ◽  
Raman Amplifiers

This paper presents a numerical analysis and comparison on the performance of multi-pump gain-flat Raman amplifiers based on triangular photonic crystal fiber and conventional fiber. It is demonstrated that the extra 5.93 dB Raman net gain can be achieved in the L-band when PCF acts as Raman gain medium. The noise performance of the two amplifiers are also calculated and compared. Comparison with the data of published literature was also carried out to verify our analysis. The results showed that PCF is the appropriate candidate for high gain Raman amplifiers.

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