Design of refractive index sensors based on the wavelength-selective resonant coupling phenomenon in dual-core photonic crystal fibers

2012 ◽  
Vol 17 (3) ◽  
pp. 037002 ◽  
Author(s):  
Bing Sun ◽  
Ming-Yang Chen ◽  
Yong-Kang Zhang ◽  
Ji-chang Yang
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fibers ◽  
Resonant Coupling ◽  
Refractive Index Sensors ◽  
Crystal Fibers ◽  
Dual Core

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.

Mathematical Model Analysis of Dispersion and Loss in Photonic Crystal Fibers

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
IS Amiri ◽  
P. Yupapin ◽  
Ahmed Nabih Zaki Rashed
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Cross Section ◽  
Photonic Crystal Fibers ◽  
Effective Cross Section ◽  
Confinement Loss ◽  
Cross Section Area ◽  
Section Area ◽  
Crystal Fibers ◽  
Analysis Of Dispersion

AbstractThis study has deeply investigated the basic equations analysis of dispersion and loss in photonic crystal fibers (PCF) within the operating wavelengths of 850, 1,300, and 1,550 nm. The confinement loss, effective refractive index, and effective cross-section area of PCF are also studied. The variations of total dispersion and losses against hole diameter and distance between holes variations in PCF are clarified. Confinement loss, effective refractive index, and effective cross-section area variations for PCF are sketches with the variations of the operating wavelength.

Nonlinear effects in photonic crystal fibers filled with nematic liquid crystals

Open Physics ◽  
2008 ◽  
Vol 6 (3) ◽  
Author(s):  
Urszula Laudyn ◽  
Katarzyna Rutkowska ◽  
Robert Rutkowski ◽  
Mirosław Karpierz ◽  
Tomasz Woliński ◽  
...  
Keyword(s):  
Refractive Index ◽  
Liquid Crystals ◽  
Photonic Crystal ◽  
Low Power ◽  
Light Beam ◽  
Photonic Crystal Fibers ◽  
Nematic Liquid Crystals ◽  
Nonlinear Effects ◽  
The Creation ◽  
Crystal Fibers

AbstractWe have investigated the nonlinear propagation of light in photonic crystal fibers filled with nematic liquid crystals. We analyzed a configuration with a periodic modulation of the refractive index corresponding to a matrix of waveguides. Matrices of coupled waveguides allow observing a variety of new phenomena both for low power light beam propagation and with an existence of nonlinear effects. The opportunity for the creation of solitary waves caused by the interplay between diffraction and nonlinear effects in these kinds of fibers is investigated. At low power the propagating light beam spreads as it couples to more and more waveguides. When the intensity is increased the light modifies the refractive index distribution, inducing a defect in the periodic structure. The creation of such a defect can lead to a situation in which the light becomes self-localized and its diffractive broadening is eliminated. Eventually, in the case of positive Kerr-type nonlinearity, a discrete soliton can be created. In the case of negative nonlinearity the refractive index decreases with the optical power and can lead to bandgap shifting. The incident beam, with a frequency initially within the bandgap, is then turned outside the bandgap resulting in the changing of the propagation effect for the discrete diffraction effect. As a consequence the delocalization of the light can be observed.

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