scholarly journals Lossy mode resonances in photonic crystal fibers

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Mauricio Salazar Sicacha ◽  
Vladimir P. Minkovich ◽  
Alexander B. Sotsky ◽  
Artur V. Shilov ◽  
Luidmila I. Sotskaya ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Transmission ◽  
Fiber Optic Sensors ◽  
Core Mode ◽  
Crystal Fiber ◽  
Leaky Modes ◽  
Resonance Coupling ◽  
Crystal Fibers ◽  
Air Channels ◽  
Mode Energy

AbstractThe interaction effect of the fundamental mode in a special photonic crystal fiber (PCF) with a thin-film absorbing coating deposited on a surface of a fiber cladding on the optical transmission of the PCF is theoretically studied. It is shown that the transmission has a multi-peak spectrum that is determined by the resonance capture of the fundamental PCF mode energy by the coating. In some cases, this capture is explained by a resonance coupling between the fundamental core mode and leaky modes of the coating, or between the fundamental PCF mode and cladding modes located between PCF air channels and the coating. Examples are presented of using this effect to develop fiber-optic sensors of refractive index or pressure, and to sense a nanoscale adsorption layer of ammonia molecules deposited on a coating surface contacting air.

scholarly journals Transmittance of Tapered Photonic Crystal Fibers With Absorbing Coatings

2020 ◽  
Author(s):  
Mauricio Salazar Sicacha ◽  
Vladimir (or Uladzimir) Petrovich Minkovich ◽  
Alexander B. Sotsky ◽  
Artur V. Shilov ◽  
Luidmila I. Sotskaya
Keyword(s):  
Photonic Crystal ◽  
Optical Transmission ◽  
Fiber Optic ◽  
Photonic Crystal Fibers ◽  
Fiber Optic Sensors ◽  
Crystal Fiber ◽  
Leaky Modes ◽  
Resonance Coupling ◽  
Crystal Fibers ◽  
Air Channels

Abstract The interaction effect of the fundamental mode of a photonic crystal fiber (PCF) with a thin-film absorbing coating deposited on a surface of a fiber cladding on the optical transmission of the PCF is studied. It is shown that the transmission has a quasi-periodic spectrum that is determined either by a resonance coupling between the leaky fundamental PCF mode and leaky modes of the coating, or between the leaky fundamental PCF mode and cladding modes localized between PCF air channels and the coating. Examples are presented of using this effect for fiber-optic sensors of refractive index, pressure, and for sensing an adsorption layer of ammonia molecules deposited on a coating surface contacting with air.

scholarly journals Helicity Enhanced Torsion Sensor Based on Liquid Filled Twisted Photonic Crystal Fibers

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1490
Author(s):  
Feng Zhang ◽  
Ying Wang ◽  
Zhiyong Bai ◽  
Shen Liu ◽  
Cailing Fu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Phase Matching ◽  
Core Mode ◽  
Crystal Fiber ◽  
Numerical Predictions ◽  
Highly Sensitive ◽  
Fiber Devices ◽  
Twist Rate ◽  
Crystal Fibers

A highly sensitive torsion sensor can be constructed by combining a twisted photonic crystal fiber with a liquid-filled waveguide in its air-hole cladding. The torsion sensitivity of this type of sensor is determined directly by the phase-matching conditions between the fiber core mode and the liquid waveguide mode, which can be improved by tuning the helicity (denoted by the initial twist rate, α0) of the twisted photonic crystal fiber. The enhancement mechanism of α0 on the sensitivity of the proposed torsion sensor is investigated theoretically, followed by experimental verifications, and a torsion sensitivity as high as 446 nm∙mm∙rad−1 can be obtained by tailoring these parameters. Experimental results show that the torsion sensitivity increases with α0 decreasing from 3.142 to 3.925 rad/mm, which are in consistence with that of the numerical predictions. The demonstrated torsion sensor is expected to contribute to the development of highly sensitive torsion-related photonic crystal fiber devices.

scholarly journals Transmittance of tapered photonic crystal fibers with absorbing coatings

2020 ◽  
Vol 238 ◽  
pp. 08005
Author(s):  
Mauricio Salazar Sicacha ◽  
Vladimir P. Minkovich ◽  
Alexander B. Sotsky ◽  
Artur V. Shilov ◽  
Luidmila I. Sotskaya
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Adsorption Layer ◽  
Photonic Crystal Fibers ◽  
Resonant Coupling ◽  
Crystal Fiber ◽  
Fiber Mode ◽  
Refractive Index Sensors ◽  
Crystal Fibers ◽  
Air Channels

The interaction of the adiabatically tapered photonic crystal fiber fundamental mode with a thin-film absorbing coating, deposited on a surface of a taper waist, on transmission of a tapered fiber is studied. Examples of using this interaction in refractive index sensors and for detection of an adsorption layer with ammonia molecules upon contact of the absorbing coating with a liquid medium are presented. It is obtained that a pronounced sensory effect occurs in the case of a resonant coupling between the fundamental fiber mode and cladding modes localized between photonic crystal fiber air channels and the absorbing coating.

scholarly journals The Comparisons and Analysis of Octagonal and Hexagonal Photonic Crystal Fiber for Flatness Dispersion Application

2014 ◽  
pp. 52
Author(s):  
Nguyen Hoang Hai
Keyword(s):  
Photonic Crystal ◽  
Wavelength Range ◽  
Optical Transmission ◽  
Pulse Propagation ◽  
Confinement Loss ◽  
Crystal Fiber ◽  
Soliton Pulse ◽  
Optical Transmission Systems ◽  
Crystal Fibers ◽  
Nonlinear Regimes

This  paper  presents  an  analysis  and comparisons  photonic  crystal  fibers  with  both  the octagonal  and  hexagonal  structures  for  flatness dispersion  managed  applications.  Management  of chromatic dispersions in photonic crystal structures is a very  important  attempt  for  optical  transmission systems,  in  both  the linear  and  nonlinear regimes,  and for  any  optical  system  supporting  ultra-short  soliton pulse  propagation.  It  has  been  shown  through numerical  simulation  results  that  using  a  four-ring octagonal lattices structure, ultra-flattened dispersion is of  0  ±  0.50  ps/(nm-km)  within  a  1.31  to  1.70  μm wavelength range (390 nm band). Confinement loss is as low as 0.001 dB/km within a 1.31 to 1.65 μm wavelength ranges.  A  four  ring  hexagonal  lattices  structure  can assume  near  zero  ultra-flattened  dispersion  of  0  ±  0.10 ps/nm/km  in  the  wavelength  range  of  1.45  µm  to  1.75 µm (300 nm)  or, 0 ± 0.51 ps/nm/km in a 1.40 to 2.0 µm (600  nm)  with  low  confinement  loss  of  less  than  10-3 dB/m below 1.70 µm.

scholarly journals Numerical simulation of all-normal dispersion visible to near-infrared supercontinuum generation in photonic crystal fibers with core filled chloroform

2021 ◽  
Vol 130 (1B) ◽  
pp. 43-51
Author(s):  
Thi Minh Ngoc Vo ◽  
Dinh Quang Ho ◽  
Tung Thanh Le ◽  
Thi Gai Le ◽  
Canh Trung Le ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Near Infrared ◽  
Cost Effective ◽  
Fused Silica ◽  
Fiber Structure ◽  
Normal Dispersion ◽  
Crystal Fiber ◽  
Crystal Fibers ◽  
Mode Area

This study proposes a photonic crystal fiber made of fused silica glass, with the core infiltrated with chloroform as a new source of supercontinuum (SC) spectrum. We numerically study the guiding properties of the fiber structure in terms of characteristic dispersion and mode area of the fundamental mode. Based on the results, we optimized the structural geometries of the CHCl3-core photonic crystal fiber to support the broadband SC generations. The fiber structure with a lattice constant of 1 μm, a filling factor of 0.8, and the diameter of the first-ring air holes equaling 0.5 μm operates in all-normal dispersion. The SC with a broadened spectral bandwidth of 0.64 to 1.80 μm is formed by using a pump pulse with a wavelength of 850 nm, 120 fs duration, and power of 0.833 kW. That fiber would be a good candidate for all-fiber SC sources as cost-effective alternative to glass core fibers.

scholarly journals PHOTONIC CRYSTAL FIBRES DESIGN USING A MULTICRITERIA BASED SOFTWARE

2011 ◽  
Author(s):  
I. Sassi ◽  
N. Belacel ◽  
Y. Bouslimani ◽  
H. Hamam
Keyword(s):  
Photonic Crystal ◽  
Optical Fibers ◽  
Communication Systems ◽  
Inductive Learning ◽  
Single Mode ◽  
Crystal Fiber ◽  
Optical Propagation ◽  
Multicriteria Method ◽  
Crystal Fibers ◽  
Physical Phenomena

The single-mode optical fiber used currently in communication systems starts showing many limitations especially for the high rates. Several physical phenomena related to the optical propagation are the cause of these limitations. The use of photonic crystal fibers (PCF) makes it possible to control most of these phenomena. In this paper, a multicriteria method is used for the design of the photonic crystal fiber with the user-defined optical proprieties. This method combines the deductive and the inductive learning and it is introduced for the first time in the field of optical fibers. This multicriteria method proves to be a powerful tool for the PCF fibers design.

High Birefringent Terahertz Photonic Crystal Fiber Based on Material-Filled Structure

2013 ◽  
Vol 462-463 ◽  
pp. 599-603
Author(s):  
Jian Hua Li ◽  
Fei Huang ◽  
Yi Yang ◽  
Bao Fu Zhang ◽  
Hua Zhou
Keyword(s):  
Photonic Crystal ◽  
Structural Parameters ◽  
Refractive Indices ◽  
Plane Wave Expansion ◽  
Modal Birefringence ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Crystal Fibers ◽  
Thz Applications ◽  
Large Frequency

A novel kind of high birefringent terahertz (THz) photonic crystal fibers (PCFs) with material-filled structure is proposed in this paper. Based on the material-filled technology, which different materials are selectively filled into four air holes of the inner first circle near the central core in the designed THz PCFs, high birefringence are obtained from the structural and material-filled induced asymmetry in large frequency ranges near 1THz. Modal birefringence with different structural parameters and diverse refractive indices of the filled materials are investigated by plane wave expansion (PWE) method. The numerical results show that high birefringence up to 10-3can be obtained and its structure is simpler than that of the early proposed highly birefringent THz PCFs. It is helpful for PCFs design and real fabrication in the potential THz applications.

Different Photonic Crystal Fibers Configurations with the Key Solutions for the Optimization of Data Rates Transmission

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
IS Amiri ◽  
Ahmed Nabih Zaki Rashed
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Photonic Crystal Fibers ◽  
Pulse Code Modulation ◽  
Quantization Level ◽  
Crystal Fiber ◽  
Data Rates ◽  
Code Modulation ◽  
Crystal Fibers ◽  
Pulse Broadening

AbstractThe study has outlined various photonic crystal fibers (PCFs) configurations for the key solution to the optimization of data rates transmission. The proposed fibers that are namely octagonal photonic crystal fiber (OPCF), hexagonal photonic crystal fiber (HPCF), and elliptical photonic crystal fiber (E-PCF) are used in the system. The dispersion parameter coefficient, pulse broadening variations, and data rates transmission are examined for proposed fibers under the same fiber lengths and number of quantization level with using pulse code modulation (PCM). The system performance is enhanced with OPCF with reducing dispersion factor, pulse broadening effects and consequently increasing data rates transmission.

Sign in / Sign up

Export Citation Format

Share Document