Universidad de Zaragoza
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decorativo Departamento de Física Aplicada (Fac. de Ciencias) | Tfno: 976 76 12 32 ó 976 76 24 35 - Fax: 976 76 12 33
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decorativo Estás en: Inicio > Research Groups > Active Optical Fibres and Waveguides > Research Lines
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decorativodecorativoActive Optical Fibres and Waveguidesdecorativo
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Research Lines

  • 1.- Amplifiers and lasers based on rare-earth doped optical fibers.

        The objective of this line is to research on the design, construction and characterization of amplifiers and lasers based on rare-earth doped optical fibers (with applications to optical communications, materials processing, and sensors). The work is carried out in collaboration with the "Fiber Optics Laboratory" of the University of Valencia (Spain).

        In recent years we have focused our attention on photonic crystal fibers (PCF), which have special properties that provide greater flexibility and efficiency to amplifiers and lasers. On the other hand, availability of a manufacturing facility of the PCF necessary at the University of Valencia allows us to use the most appropriate fiber in each device designed. We have worked with low concentration erbium-doped PCF (to build amplifiers and lasers) and with high concentration ones (to build sensors). In order to make realistic designs we have developed new techniques for characterization and simulation of the manufactured fibers. With a view to applications requiring higher power laser emission, we are working on lasers based on ytterbium-doped, double clad fibers.

        Another objective of this line of work is the study of the behavior in chaotic regime of some of the lasers manufactured, for applications to secure information transmission.

     
  • 2.- Amplifiers and lasers based on erbium and ytterbium-doped integrated optical waveguides.

        This line focuses on the study and application of lasers based on erbium- and ytterbium-doped integrated waveguides, written with ultrashort laser pulses, in collaboration with the "Laser Processing Group " from CSIC in Madrid (Spain). Our goal is the application of such lasers in integrated circuits with a three-dimensional distribution of components in order to increase integration density.

        In recent years, we have used our experimental and calculation techniques (in interaction with the Madrid group, which is the waveguide manufacturer) to improve the quality of the guides to reach levels competitive with those manufactured in different countries with the same technique.

        With the best guides, we have achieved lasing regime with the use of cavities external to the waveguide. Ring and linear cavities with Bragg gratings have been constructed, trying to optimize them in order to minimize losses. In the immediate future, we will seek fully integrated and optimize lasers with Bragg gratings written on the waveguides, instead of using external cavities as we have done so far. Later on, we will study using these lasers with other integrated components in three-dimensional structures.
     

 

 

 

 

 

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©2014 Departamento de Física Aplicada (Fac. de Ciencias) | Tfno: 976 76 12 32 ó 976 76 24 35 - Fax: 976 76 12 33
©2014 Universidad de Zaragoza (Pedro Cerbuna 12, 50009 ZARAGOZA-ESPAÑA | Tfno. información: (34) 976-761000)
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