Photonic crystal optical fibers for dispersion compensation and Raman amplification: Design and experiment

2007 ◽  
Vol 49 (4) ◽  
pp. 872-874 ◽  
Author(s):  
K. Digweed-Lyytikainen ◽  
C. A. De Francisco ◽  
D. Spadoti ◽  
A. A. Juriollo ◽  
J. B. Rosolem ◽  
...  
2007 ◽  
Vol 26 (5) ◽  
pp. 255-270 ◽  
Author(s):  
S. P. N. Cani ◽  
C. A. De Francisco ◽  
D. H. Spadoti ◽  
V. E. Nascimento ◽  
B.-H. V. Borges ◽  
...  

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4263 ◽  
Author(s):  
José Algorri ◽  
Dimitrios Zografopoulos ◽  
Alberto Tapetado ◽  
David Poudereux ◽  
José Sánchez-Pena

Photonic crystal fibers (PCFs) are a special class of optical fibers with a periodic arrangement of microstructured holes located in the fiber’s cladding. Light confinement is achieved by means of either index-guiding, or the photonic bandgap effect in a low-index core. Ever since PCFs were first demonstrated in 1995, their special characteristics, such as potentially high birefringence, very small or high nonlinearity, low propagation losses, and controllable dispersion parameters, have rendered them unique for many applications, such as sensors, high-power pulse transmission, and biomedical studies. When the holes of PCFs are filled with solids, liquids or gases, unprecedented opportunities for applications emerge. These include, but are not limited in, supercontinuum generation, propulsion of atoms through a hollow fiber core, fiber-loaded Bose–Einstein condensates, as well as enhanced sensing and measurement devices. For this reason, infiltrated PCF have been the focus of intensive research in recent years. In this review, the fundamentals and fabrication of PCF infiltrated with different materials are discussed. In addition, potential applications of infiltrated PCF sensors are reviewed, identifying the challenges and limitations to scale up and commercialize this novel technology.


Author(s):  
Anja Schönhardt ◽  
Dietmar Nau ◽  
Christina Bauer ◽  
André Christ ◽  
Hedi Gräbeldinger ◽  
...  

We characterized the electromagnetic field of ultra-short laser pulses after propagation through metallic photonic crystal structures featuring photonic and plasmonic resonances. The complete pulse information, i.e. the envelope and phase of the electromagnetic field, was measured using the technique of cross-correlation frequency resolved optical gating. In good agreement, measurements and scattering matrix simulations show a dispersive behaviour of the spectral phase at the position of the resonances. Asymmetric Fano-type resonances go along with asymmetric phase characteristics. Furthermore, the spectral phase is used to calculate the dispersion of the sample and possible applications in dispersion compensation are investigated. Group refractive indices of 700 and 70 and group delay dispersion values of 90 000 fs 2 and 5000 fs 2 are achieved in transverse electric and transverse magnetic polarization, respectively. The behaviour of extinction and spectral phase can be understood from an intuitive model using the complex transmission amplitude. An associated depiction in the complex plane is a useful approach in this context. This method promises to be valuable also in photonic crystal and filter design, for example, with regards to the symmetrization of the resonances. This article is part of the themed issue ‘New horizons for nanophotonics’.


2018 ◽  
Vol 30 (17) ◽  
pp. 1499-1502 ◽  
Author(s):  
Huizhen Xu ◽  
Xiulin Wang ◽  
Xiaojing Huang ◽  
Changjie Zhou ◽  
Huili Zhu ◽  
...  

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