Journal: Optics Communications
Paper: Ultrasensitive UV-tunable grating in all-solid photonic bandgap fibers

AUTHORS: J.M Lázaro, B.T. Kuhlmey, J.C. Knight, J.M. López-Higuera, B.J. Eggleton
Abstracts:
We study the shift of a long period grating’s resonance wavelength with UV induced refractive index changes in an all-solid photonic bandgap fiber. A long period grating is mechanically imprinted in an all-solid photonic bandgap fiber with Germanium doped silica high-index rods in a lower-index silica background. The index of the high-index rods is modified through UV exposure, and we observe that the long period grating’s resonance shifts with the bandgaps. With a sensitivity of 21,000 nanometers per refractive index unit and a 8.8 nm resonance width changes of refractive index of 3x10-6 are in principle detectable

Journal: Journal of Biomedical Optics
Paper: Automated Identification of Tumor Microscopic Morphology, based upon Macroscopically Measured Scatter Signatures

AUTHORS: P. Beatriz Garcia-Allende, Venkataramanan Krishnaswamy, P. Jack Hoopes, Kimberley S. Samkoe, Olga M. Conde, Brian W. Pogue
Abstracts:
An automated algorithm and methodology is presented to identify tumor tissue morphologies based upon broadband scatter data measured by raster scan imaging of the samples. A quasi-confocal reflectance imaging system was used to directly measure the tissue scatter reflectance in situ, and the spectrum was used to identify the spectral power, amplitude and total wavelength-integrated intensity. Pancreatic tumor and normal samples were characterized using the instrument and subtle changes in the scatter signal were encountered within regions of each sample. Discrimination between normal vs. tumor tissue was readily performed using a K-Nearest Neighbor (KNN) classifier algorithm. A similar approach worked for regions of tumor morphology when statistical pre-processing of the scattering parameters was included to create additional data features. This type of automated interpretation methodology can provide a tool for guiding surgical resection in areas were microscopy imaging cannot be realized efficiently by the surgeon. In addition, the results indicate important design changes for future systems.

Journal: Optics Communications
Paper: Ultrasensitive UV-tunable grating in all-solid photonic bandgap fibers

AUTHORS: J.M Lázaro, B.T. Kuhlmey, J.C. Knight, J.M. López-Higuera, B.J. Eggleton
Abstracts:
We study the shift of a long period grating’s resonance wavelength with UV induced refractive index changes in an all-solid photonic bandgap fiber. A long period grating is mechanically imprinted in an all-solid photonic bandgap fiber with Germanium doped silica high-index rods in a lower-index silica background. The index of the high-index rods is modified through UV exposure, and we observe that the long period grating’s resonance shifts with the bandgaps. With a sensitivity of 21,000 nanometers per refractive index unit and a 8.8 nm resonance width changes of refractive index of 3x10-6 are in principle detectable

Ayer, 16 de marzo de 2009, el miembro del Grupo de Ingeniería Fotónica, Jesús Mª Mirapeix Serrano recogió el Premio Consejo Social a la mejor Tesis Doctoral en el área de la ingeniería. Recibió el premio de manos del Presidente del Parlamento y en presencia del Presidente del Gobierno de Cantabria, el Rector y el Alcalde de Santander.

http://www.eldiariomontanes.es/20090316/local/cantabria-general/revilla-universidad-parte-respuesta-200903161813.html

http://www.unican.es/WebUC/Internet/Noticias_y_novedades/Noticias/20090316+f.htm