Optical coupling characteristics of graded-index type photonic crystal fiber collimator depending on air hole diameter ratio to pitch

2019 ◽  
Vol 26 (6) ◽  
pp. 590-596
Author(s):  
Mizuki Wakabayashi ◽  
Hirohisa Yokota ◽  
Yoh Imai
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Diameter Ratio ◽  
Hole Diameter ◽  
Optical Coupling ◽  
Graded Index ◽  
Crystal Fiber ◽  
Fiber Collimator ◽  
Coupling Characteristics ◽  
Air Hole

scholarly journals Analysis of the Effect of Air Hole Diameter and Lattice Pitch in Optical Properties for Hexagonal Photonic Crystal Fiber

2015 ◽  
Vol 05 (07) ◽  
pp. 227-233 ◽  
Author(s):  
Sagor Biswas ◽  
Ragib Shakil Rafi ◽  
Md. Abdullah Al-Amin ◽  
Sabbir Alam
Keyword(s):  
Optical Properties ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Hole Diameter ◽  
Crystal Fiber ◽  
Air Hole

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.

Investigation on Dispersion Property of a Novel Photonic Crystal Fiber with Square Array Air Holes

2012 ◽  
Vol 571 ◽  
pp. 278-282
Author(s):  
Yan Jun Liu ◽  
Tong Dai
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Structural Parameters ◽  
Beam Propagation Method ◽  
Hole Diameter ◽  
Dispersion Parameter ◽  
Dispersion Property ◽  
Crystal Fiber ◽  
Square Array ◽  
Air Hole

The dispersion property of a novel photonic crystal fiber with square array air holes was simulated with the vectorial beam propagation method. The impacts of the pitch and hole diameter on the effective area of fundamental mode and the dispersion parameter were evaluated. The results indicate that the effective refractive index decreases and the dispersion parameter increases with air hole diameter increasing and the pitch decreasing, the structure parameters of inner three rings air hole influences the dispersion characteristics greatly. Thus the dispersion property of the photonic crystal fiber can be tailed by the structural parameters.

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