A Novel High-Birefringent Photonic Crystal Fiber and its Polarization Maintaining Properties

2013 ◽  
Vol 760-762 ◽  
pp. 185-189
Author(s):  
Jian Hui Zeng ◽  
Xu You Li ◽  
Wen Bin Hu
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Theoretical Method ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Vector Finite Element Method ◽  
Vector Finite Element ◽  
Polarization Maintaining ◽  
Modal Field ◽  
Full Vector

A novel high-birefringent photonic crystal fiber (PCF) was proposed and analyzed by full-vector finite element method (FEM). The modal field and birefringence properties were investigated. All of air holes in proposed PCF are round, and their diameters are the same. It is greatly reduce the difficulty of fabrication. According to the results of numerical analysis, it can be observed that the mode birefringence of this novel PCF can be easily achieve the order of 10-3at 1.55μm. This research provides effective theoretical method for the fabrication, development and construction of high-birefringence photonic crystal fiber.

High Birefringence and Negative Dispersion Effect of Hybrid-Core Photonic Crystal Fiber

2012 ◽  
Vol 566 ◽  
pp. 599-603
Author(s):  
Ding Jie Xu ◽  
Hong Ru Song ◽  
Wei Wang ◽  
Yue Fan
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Structure Characteristics ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Negative Dispersion ◽  
Vector Finite Element Method ◽  
Vector Finite Element ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining

A novel type of hybrid-core photonic crystal fiber is proposed, whose core is composed of center-directionally decrescent air holes arrayed as pentagonal and an octagonal structure. Characteristics of the proposed PCF are analyzed theoretically by using all vector finite element method (V-FEM). Results show that high-birefringence and negative dispersion are obtained over the wavelength range from 0.8µm to 1.8µm, and the maximum of birefringence reaches 1.36×10-2 and negative dispersion achieves -600 ps•nm-1•km-1~-60 ps•nm-1•km-1, which will fulfill the requirement of high-birefringence polarization maintaining fiber fabricating and wideband dispersion compensating.

A Single-Polarization Single-Mode Photonic Crystal Fiber with Four Lines of Small Elliptical Air-Holes

2011 ◽  
Vol 301-303 ◽  
pp. 50-54
Author(s):  
Hong Jun Zheng ◽  
Chong Qing Wu ◽  
Zhi Wang ◽  
Jian Wang ◽  
Shan Liang Liu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Confinement Loss ◽  
Crystal Fiber ◽  
Vector Finite Element Method ◽  
Vector Finite Element ◽  
Perfect Matched Layer ◽  
Single Polarization ◽  
Full Vector

We present a novel single-polarization single-mode photonic crystal fiber (SPSM-PCF) design with four lines of small elliptical air-holes in order to obtain wider bandwidth for SPSM operation. The characteristics of the proposed SPSM-PCF are studied by using a full-vector finite element method (FEM) with perfect matched layer (PML) boundary conditions. At the wavelength of 1.55 µm, the confinement loss of the x-polarized mode is lower than 0.5 dB/km, whereas the loss of the y-polarized mode is larger than 50 dB/km. Compared with the case of x-polarized mode, the y-polarized mode can be suppressed in the PCF. Then, the SPSM operation is obtained. The proposed PCF can perform SPSM operation with broadband of 600 nm for considering the confinement loss ratio and the loss difference.

Polarization Properties of Polymer Photonic Crystal Fiber with Square-Lattice Elliptical Air-Hole

2013 ◽  
Vol 631-632 ◽  
pp. 233-238
Author(s):  
Fei Liu ◽  
Hong Yan Gao ◽  
Yu Qian
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Solid Polymer ◽  
Square Lattice ◽  
Leakage Loss ◽  
Modal Birefringence ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Vector Finite Element Method ◽  
Vector Finite Element

A novel type of photonic crystal fiber for high birefringence and zero-walkoff is proposed based on polymer, the fiber is composed of a solid polymer core and a cladding with square lattice elliptical air-holes along the fiber length. The optical birefringence and polarization-dependent leakage loss are studied numerically based on the full-vector finite element method(FEM). Numerical results show that the proposed fiber has heightened modal birefringence of the order of 10-2; and the leakage loss is reduced to 0.08dB/m at wavelength of 0.65μm when it has 10 rings of elliptical air-holes. So the proposed PCFs may be useful in the field of high birefringence polarization-maintaining optical communication.

scholarly journals A Highly Birefringent Photonic Crystal Fiber for Terahertz Spectroscopic Chemical Sensing

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1799
Author(s):  
Tianyu Yang ◽  
Liang Zhang ◽  
Yunjie Shi ◽  
Shidi Liu ◽  
Yuming Dong
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Chemical Sensing ◽  
Numerical Aperture ◽  
Wide Band ◽  
Relative Sensitivity ◽  
Chemical Sensitivity ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Polarization Maintaining

A photonic crystal fiber (PCF) with high relative sensitivity was designed and investigated for the detection of chemical analytes in the terahertz (THz) regime. To ease the complexity, an extremely simple cladding employing four struts is adopted, which forms a rectangular shaped core area for filling with analytes. Results of enormous simulations indicate that a minimum 87.8% relative chemical sensitivity with low confinement and effective material absorption losses can be obtained for any kind of analyte, e.g., HCN (1.26), water (1.33), ethanol (1.35), KCN (1.41), or cocaine (1.50), whose refractive index falls in the range of 1.2 to 1.5. Besides, the PCF can also achieve high birefringence (∼0.01), low and flat dispersion, a large effective modal area, and a large numerical aperture within the investigated frequency range from 0.5 to 1.5 THz. We believe that the proposed PCF can be applied to chemical sensing of liquid and THz systems requiring wide-band polarization-maintaining transmission and low attenuation.

Design of broadband single-polarization filter based on simple structure photonic crystal fiber with gold-coated air holes

2021 ◽  
pp. 2150473
Author(s):  
Sinuo An ◽  
Chunjie Hu ◽  
Lei Zhou ◽  
Zao Yi ◽  
Chao Liu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Simple Structure ◽  
Structure Design ◽  
Characteristic Parameters ◽  
Polarization Filter ◽  
Crystal Fiber ◽  
Vector Finite Element Method ◽  
Vector Finite Element ◽  
Single Polarization

A polarization filter based on simple structure photonic crystal fiber (PCF) coated with gold air holes is designed in this work. The full vector finite element method (FEM) is used to calculate the characteristic parameters of PCF. In the final numerical simulation results, the loss peak in the [Formula: see text] polarization direction is 2305.72 dB/cm and the [Formula: see text]-polarized loss is as low as 75.86 dB/cm at 1.31 [Formula: see text]m. For the fiber length of 1000 [Formula: see text]m, the CT reaches 1936.83 dB and a wide bandwidth greater than 20 dB can provide above 800 nm. The content of this paper can provide a new idea for filter structure design.

scholarly journals Characteristics of Ultrasensitive Hexagonal-Cored Photonic Crystal Fiber for Hazardous Chemical Sensing

Photonics ◽  
2022 ◽  
Vol 9 (1) ◽  
pp. 38
Author(s):  
Abdul Mu’iz Maidi ◽  
Norazanita Shamsuddin ◽  
Wei-Ru Wong ◽  
Shubi Kaijage ◽  
Feroza Begum
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Chemical Sensing ◽  
Chromatic Dispersion ◽  
Relative Sensitivity ◽  
Crystal Fiber ◽  
Hazardous Chemical ◽  
Sensing Applications ◽  
Vector Finite Element Method ◽  
Vector Finite Element

A highly sensitive non-complex cored photonic crystal fiber sensor for hazardous chemical sensing with water, ethanol, and benzene analytes has been proposed and is numerically analyzed using a full-vector finite element method. The proposed fiber consists of a hexagonal core hole and two cladding air hole rings, operating in the lower operating wavelength of 0.8 to 2.6 µm. It has been shown that the structure has high relative sensitivity of 94.47% for water, 96.32% for ethanol and 99.63% for benzene, and low confinement losses of 7.31 × 10−9 dB/m for water, 3.70 × 10−10 dB/m ethanol and 1.76 × 10−13 dB/m benzene. It also displays a high power fraction and almost flattened chromatic dispersion. The results demonstrate the applicability of the proposed fiber design for chemical sensing applications.

Efficient photonic crystal fiber polarization splitters composed of gallium arsenide and nematic liquid crystals

2020 ◽  
pp. 2150077
Author(s):  
Yifeng Ding ◽  
Chao Liu ◽  
Lin Yang ◽  
Jingwei Lv ◽  
Guanglai Fu ◽  
...  
Keyword(s):  
Gallium Arsenide ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Fiber Length ◽  
Structural Parameters ◽  
Extinction Ratio ◽  
Crystal Fiber ◽  
Vector Finite Element Method ◽  
Vector Finite Element ◽  
Biochemical Detection

Two photonic crystal fiber (PCF) polarization beam splitters (PBSs) featuring ultra-short length and ultra-high extinction ratios at wavelengths of 1.31 [Formula: see text]m and 1.55 [Formula: see text]m are designed and investigated. Non-silicon materials, such as gallium arsenide (GaAs) and nematic liquid crystal (NLC), are incorporated into the structure to ensure operation of the splitters in the communication bandwidth. Based on the full-vector finite element method (FEM), numerical simulation is carried out to optimize the structural parameters systematically. Specifically, for the splitter operating at 1.31 [Formula: see text]m, the optimal optical fiber length, extinction ratio, and bandwidth are 27.87234 [Formula: see text]m, [Formula: see text] dB, and 152 nm, respectively. In comparison, the optimal fiber length, extinction ratio, and bandwidth of the splitter at the wavelength of 1.55 [Formula: see text]m are 15.59356 [Formula: see text]m, [Formula: see text] dB, and 200 nm, respectively. The results reveal that the splitters have great potential in environmental monitoring, biochemical detection, and optical communication.

A Kind of Novel Dual-Core High Birefringence Photonic Crystal Fiber

2014 ◽  
Vol 1044-1045 ◽  
pp. 3-7
Author(s):  
Yu Wei Sun ◽  
Yu Kun Bai
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Structural Parameters ◽  
Chromatic Dispersion ◽  
Coupling Length ◽  
The Novel ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Polarization Maintaining ◽  
Dual Core

A dual-core photonic crystal fiber (PCF) with high birefringence, short coupling length and broadband flat dispersion is proposed in the paper. The symmetry of the original symmetric structure composed of hexagonally distributed air holes is distorted by replacing the innermost 12 air holes with 6 elliptical air holes. The characteristics of the dual-core PCF such as birefringence, coupling length and chromatic dispersion are analyzed by tuning its structural parameters. The results demonstrated that the dual-core PCF exhibits simultaneously a birefringence of up to 10-2, a coupling length of 68.178 for the x-polarization and 74.825 for the y-polarization, and a broadband flat dispersion ranging from 1.1 to 1.6. The novel dual-core PCF may find applications in polarization-maintaining fibers and fiber-based polarization beam splitters/couplers with broadband flat dispersion.

Sign in / Sign up

Export Citation Format

Share Document