scholarly journals NONLINEAR PROPERTIES OF STRUCTURAL HETEROGENEOUS PHOTONIC CRYSTAL FIBERS WITH As2Se3 SUBSTRATE

2021 ◽  
pp. 113-128
Author(s):  
Thi Thuy Nguyen ◽  
Van Hung Dao
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fibers ◽  
Nonlinear Coefficient ◽  
Confinement Loss ◽  
Normal Dispersion ◽  
Long Wavelength ◽  
Nonlinear Properties ◽  
Effective Mode Area ◽  
Crystal Fibers ◽  
Mode Area

We examine the possibility of improving the nonlinear properties of photonic crystal fibers (PCFs) with As2Se3 substrates by creating a difference in the diameters of the air holes of the rings around the core. With the new design, all-normal dispersion properties, small effective mode area, high nonlinear coefficient, and low confinement loss were achieved in the long-wavelength range of 2.0–7.0 µm. The highest nonlinear coefficient is 4414.918 W-1.km-1 at 4.5 µm for the lattice constant (Ʌ) of 3.0 µm and the filling factor (d/Ʌ) of 0.85, while the lowest loss is 1.823´10-21 dB/cm with Ʌ = 3.5 µm and d/Ʌ = 0.8. Based on the numerical simulation results, the characteristics of two optimal structures have been analyzed in detail to guide the application in supercontinuum generation.

Highly birefringent photonic crystal fibers with flattened dispersion and low effective mode area

Optik ◽  
2011 ◽  
Vol 122 (23) ◽  
pp. 2151-2154 ◽  
Author(s):  
Jian Liang ◽  
Maojin Yun ◽  
Weijin Kong ◽  
Xin Sun ◽  
Wenfei Zhang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fibers ◽  
Effective Mode Area ◽  
Crystal Fibers ◽  
Mode Area

scholarly journals Numerical Analysis of the Characteristics of Glass Photonic Crystal Fibers Infiltrated with Alcoholic Liquids

2020 ◽  
Vol 30 (3) ◽  
Author(s):  
Thuy Thi Nguyen ◽  
Trang Thi Gia Chu ◽  
Minh Van Le ◽  
Vu Quoc Tran ◽  
Khoa Quoc Doan ◽  
...  
Keyword(s):  
Refractive Index ◽  
Effective Refractive Index ◽  
Photonic Crystal Fibers ◽  
Confinement Loss ◽  
Dispersion Property ◽  
Effective Mode Area ◽  
Technology Applications ◽  
Crystal Fibers ◽  
Mode Area ◽  
Air Hole

The characteristics of PCF with various air hole diameters infiltrated with alcoholic liquids such as ethanol, methanol, propanol and butanol are numerically investigated. Based on the numerical results, we have analyzed and compare in detail the characteristics of these fibers including effective refractive index, effective mode area, dispersion and confinement loss for two case: the diameters and lattices constant of air holes are equal 1 µm and 5µm, 1.42µm and 3.26µm, respectively. The PCF infiltrated with ethanol and butanol showed better near zero flattened dispersion property at 1.42µm and 1µm wavelength respectively. With diameters and lattices constant of air holes equal 1.42μm and 3.26μm, the smallest dispersion of PCF filled with ethanol of 5.91075308 (ps.(nm.km)-1) and methanol of 19.3592474 (ps.(nm.km)-1). The highest ZDW of the PCF infiltrated with ethanol and methanol is 1.24604224µm and 1.22405714µm, respectively. Specially, the value of effective refractive index, effective mode area, dispersion and confinement loss decrease in an orderly manner from butanol, propanol, ethanol to methanol and all the alcoholic liquids’s cuvers of dispersion are flat and are very close to each other and near the zero dispersion curve in case the diameters and lattices constant of air holes are equal 1µm and 5µm. The proposed PCF shows a promising prospect in technology applications such as supercontinuum generation.

scholarly journals Flattened zero dispersion Photonic crystal fibers with embedded nano holes and ultra low confinement loss for supercontinuum generation

2019 ◽  
Vol 8 (4) ◽  
pp. 7-15 ◽  
Author(s):  
K. F. Fiaboe ◽  
P. Kumar ◽  
J. S. Roy
Keyword(s):  
Photonic Crystal ◽  
Peak Power ◽  
Photonic Crystal Fibers ◽  
Nonlinear Coefficient ◽  
Far Infrared ◽  
Supercontinuum Generation ◽  
Confinement Loss ◽  
Visible Range ◽  
Crystal Fiber ◽  
Crystal Fibers

In this paper unique photonic crystal fiber (PCF) structure with nanoholes embedded have been studied. Embedded nanoholes have been filled with different materials of alcoholic groups like butanol, ethanol, methanol and propanol. Investigations of these structure shows flattened zero dispersion in visible range to far infrared regions. Simulated PCF structure reports ultra-low confinement loss of the order of 10-8 dB/km. Designed PCF promises to give large nonlinear coefficient of 3000 W-1Km-1 at 1335nm wavelengths. Numerical simulation of the fiber for the generation of supercontinuum generation (SCG) has been performed. Low power pump pulses of 50fs duration have been used. With a fiber of length of 15cm and pulses of 1kW, 2kW, 5kW and 10kW peak power, supercontinuum broadening of about 607nm, 908nm, 1987nm and 2405nm respectively.

scholarly journals Characteristic Analysis and Structural Design of Hollow-Core Photonic Crystal Fibers with Band Gap Cladding Structures

Sensors ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 284
Author(s):  
Bowei Wan ◽  
Lianqing Zhu ◽  
Xin Ma ◽  
Tianshu Li ◽  
Jian Zhang
Keyword(s):  
Photonic Crystal ◽  
Band Gap ◽  
Photonic Crystal Fibers ◽  
Relative Sensitivity ◽  
Confinement Loss ◽  
Hollow Core ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
The Core ◽  
Crystal Fibers

Due to their flexible structure and excellent optical characteristics hollow-core photonic crystal fibers (HC-PCFs) are used in many fields, such as active optical devices, communications, and optical fiber sensing. In this paper, to analyze the characteristics of HC-PCFs, we carried out finite element analysis and analyzed the design for the band gap cladding structure of HC-PCFs. First, the characteristics of HC19-1550 and HC-1550-02 in the C-band were simulated. Subsequently, the structural optimization of the seven-cell HC-1550-02 and variations in characteristics of the optimized HC-1550-02 in the wavelength range 1250–1850 nm were investigated. The simulation results revealed that the optimal number of cladding layers is eight, the optimal core radius is 1.8 times the spacing of adjacent air holes, and the optimal-relative thickness of the core quartz-ring is 2.0. In addition, the low confinement loss bandwidth of the optimized structure is 225 nm. Under the transmission bandwidth of the optimized structure, the core optical power is above 98%, the confinement loss is below 9.0 × 10−3 dB/m, the variation range of the effective mode field area does not exceed 10 μm2, and the relative sensitivity is above 0.9570. The designed sensor exhibits an ultra-high relative sensitivity and almost zero confinement loss, making it highly suitable for high-sensitivity gas or liquid sensing.

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