scholarly journals Cladding defects in hollow core fibers for surface mode suppression and improved birefringence

2014 ◽  
Vol 22 (19) ◽  
pp. 23324 ◽  
Author(s):  
M. Michieletto ◽  
J. K. Lyngsø ◽  
J. Lægsgaard ◽  
O. Bang
Keyword(s):  
Surface Mode ◽  
Hollow Core ◽  
Mode Suppression

Study of Birefringence and Mode Field for Hollow-Core Photonic Bandgap Fiber

2014 ◽  
Vol 609-610 ◽  
pp. 324-329
Author(s):  
Li Shuang Feng ◽  
Wen Shuai Song ◽  
Xiao Yuan Ren
Keyword(s):  
Field Distribution ◽  
Photonic Bandgap ◽  
Surface Mode ◽  
Hollow Core ◽  
The Finite Element Method ◽  
Core Mode ◽  
Photonic Bandgap Fiber ◽  
Mode Field ◽  
Air Core ◽  
Polarization Maintaining

Since the Appearance of Hollow-Core Photonic Bandgap Fiber (HC-PBF), it was Widely Concerned for its Excellent Characteristics. in Order to Study the Characteristics of the HC-PBF that can be Used in Resonator Fiber Optic Gyros (R-Fogs), the Model Structure of a Polarization-Maintaining HC-PBF was Built and its Performance was Simulated by Using the Finite Element Method (FEM). its Mode Field Distribution and Birefringence Characteristics were Obtained. the Influences of the Air Core and Cladding Structures on the Mode Field Distribution and Birefringence were Simulated and Analyzed Further. the Result Showed that there are both Core Mode and Surface Mode in the Structure we Built. by Adding Scattering Points into the Fiber Core, the Surface Mode can be Significantly Suppressed. by Matching the Size of Core and Air Holes around the Core, a Birefringence up to 8*10-4 were Obtained.

Higher-order mode suppression in twisted single-ring hollow-core photonic crystal fibers

2017 ◽  
Vol 42 (11) ◽  
pp. 2074 ◽  
Author(s):  
N. N. Edavalath ◽  
M. C. Günendi ◽  
R. Beravat ◽  
G. K. L. Wong ◽  
M. H. Frosz ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fibers ◽  
Higher Order ◽  
Hollow Core ◽  
Order Mode ◽  
Mode Suppression ◽  
Single Ring ◽  
Crystal Fibers ◽  
Higher Order Mode

Surface mode free and highly birefringent single-mode hollow core photonic bandgap fibers

2007 ◽  
Author(s):  
Stefano Selleri ◽  
Federica Poli ◽  
Matteo Foroni ◽  
Annamaria Cucinotta
Keyword(s):  
Photonic Bandgap ◽  
Single Mode ◽  
Surface Mode ◽  
Hollow Core ◽  
Photonic Bandgap Fibers

scholarly journals Higher-Order Mode Suppression in Antiresonant Nodeless Hollow-Core Fibers

Micromachines ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 128 ◽  
Author(s):  
Aichen Ge ◽  
Fanchao Meng ◽  
Yanfeng Li ◽  
Bowen Liu ◽  
Minglie Hu
Keyword(s):  
Single Mode ◽  
Ring Structure ◽  
Higher Order ◽  
Hollow Core ◽  
Order Mode ◽  
High Loss ◽  
Mode Suppression ◽  
Single Ring ◽  
Nested Structure ◽  
Higher Order Mode

Negative curvature hollow-core fibers (NC-HCFs) are useful as gas sensors. We numerically analyze the single-mode performance of NC-HCFs. Both single-ring NC-HCFs and nested antiresonant fibers (NANFs) are investigated. When the size of the cladding tubes is properly designed, higher-order modes (HOMs) in the fiber core can be coupled with the cladding modes effectively and form high-loss supermodes. For the single-ring structure, we propose a novel NC-HCF with hybrid cladding tubes to enable suppression of the first two HOMs in the core simultaneously. For the nested structure, we find that cascaded coupling is necessary to maximize the loss of the HOMs in NANFs, and, as a result, NANFs with five nested tubes have an advantage in single-mode guidance performance. Moreover, a novel NANF with hybrid extended cladding tubes is proposed. In this kind of NANF, higher-order mode extinction ratios (HOMERs) of 105 and even 106 are obtained for the LP11 and LP21 modes, respectively, and a similar level of 105 for the LP02 modes. Good single-mode performance is maintained within a broad wavelength range. In addition, the loss of the LP01 modes in this kind of NANF is as low as 3.90 × 10−4 dB/m.

The Optimization Research on Hollow-Core Photonic BandgapFiber CoreTransversal Radius

2014 ◽  
Vol 884-885 ◽  
pp. 370-373
Author(s):  
Ding Jie Xu ◽  
Hong Ru Song ◽  
Wei Wang ◽  
Yue Fan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Optical Fibers ◽  
Surface Mode ◽  
Hollow Core ◽  
Vector Finite Element Method ◽  
Mode Loss ◽  
Vector Finite Element ◽  
Full Vector ◽  
Element Method

In hollow-core optical fibers, surface mode is one most important reasons causes fiber loss. In order to suppress surface mode loss, simulations of the designed hollow-core optical fibers have been made numerically using full vector finite element method, and the light intensity distributions are in the different core transversal radius is obtained. Analysis results show that both the enlargement of core radius and using fusing transversal method lead into the core holeare more helpful to suppress surface mode loss. This conclusion may provide a basis for small duty cycle (f< 85%) hollow-core optical fibers fabrication the theoretically. Keywords:hollow-corephotonic band-gap fiber (HC-PBF),finite element method (FEM), surface mode loss, core transversal radius, core intersected method

Surface-mode suppression in a thick microstrip antenna by parasitic elements

1995 ◽  
Vol 8 (3) ◽  
pp. 145-146 ◽  
Author(s):  
Choon Sae Lee ◽  
Vahakn Nalbandian ◽  
Felix Schwering
Keyword(s):  
Microstrip Antenna ◽  
Surface Mode ◽  
Mode Suppression

scholarly journals Accurate Loss and Surface Mode Modeling in Fabricated Hollow-Core Photonic Bandgap Fibers

2014 ◽  
Author(s):  
Eric Numkam Fokoua ◽  
Seyed Reza Sandoghchi ◽  
Yong Chen ◽  
Natalie. V. Wheeler ◽  
Naveen K. Baddela ◽  
...  
Keyword(s):  
Photonic Bandgap ◽  
Surface Mode ◽  
Hollow Core ◽  
Photonic Bandgap Fibers

scholarly journals Temperature-Dependent Group Delay of Photonic-Bandgap Hollow-Core Fiber Tuned by Surface-Mode Coupling

2021 ◽  
Author(s):  
Yazhou Wang ◽  
Zhengran Li ◽  
Fei Yu ◽  
Meng Wang ◽  
Ying Han ◽  
...  
Keyword(s):  
Mode Coupling ◽  
Group Delay ◽  
Photonic Bandgap ◽  
Surface Mode ◽  
Hollow Core ◽  
Temperature Dependent ◽  
Core Fiber
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