Browsing by Subject "Diffraction gratings"

Now showing items 1-8 of 8

    • Conference Object  

      Characteristics of fiber grating sensors and their relation to manufacturing techniques 

      Alavie, A. Tino; Maaskant, Robert; Stubbe, Raoul; Othonos, Andreas S.; Ohn, Myo M.; Sahlgren, Bengt; Measures, Raymond M. (Society of Photo-Optical Instrumentation Engineers, 1995)
      This work examines the effects of different manufacturing techniques of fiber optic intracore Bragg gratings on their sensing and system parameters. Specifically, we have looked at tolerance with respect to center wavelength, ...
    • Conference Object  

      Fiber Bragg-grating-based laser sensor 

      Wallace, Colin G.; Othonos, Andreas S.; Uttamchandani, Deepak G. (1995)
      Fiber Bragg gratings are attracting increasing attention as sensors for the measurement of strain, temperature, and pressure. They are equally important as wavelength selective reflectors for fiber, and to a lesser extent, ...
    • Conference Object  

      Fiber laser sensor array 

      Alavie, A. Tino; Karr, Shawn E.; Othonos, Andreas S.; Measures, Raymond M. (Publ by Society of Photo-Optical Instrumentation Engineers, 1993)
      An intracore Bragg grating and a broadband reflector are used as cavity end mirrors of a tunable Erbium-doped fiber laser where the Bragg grating serves the dual purpose of the tuning element and the sensor. This fiber ...
    • Article  

      Novel and Improved Methods of Writing Bragg Gratings with Phase Masks 

      Othonos, Andreas S.; Lee, X. (1995)
      The authors demonstrate the importance of spatial coherence of the writing beam for inscribing Bragg gratings with a phase mask. Bragg gratings were written using a normal excimer laser with the fiber placed at various ...
    • Article  

      Phase shifted Bragg gratings formed in optical fibres by post-fabrication thermal processing 

      Uttamchandani, D.; Othonos, Andreas S. (1996)
      Fibre Bragg gratings have been post-fabrication processed using localised heat treatment, with significant changes to their transmission and reflection characteristics being observed. Experimental results of the spectral ...
    • Article  

      Prism-based ultrafast pulse-shaping apparatus 

      Lioudakis, Emmanouil E.; Adamou, Katerina; Othonos, Andreas S. (2005)
      We report on a computer-controlled pulse-shaper setup with high-efficiency throughput, based on dispersive prisms, as an alternative to the conventional grating ultrafast pulse-shaping apparatus. A detailed description of ...
    • Article  

      Superimposed gratings WDM on Ge-doped silica on silicon planar waveguide 

      Bismuth, J.; Othonos, Andreas S.; Sweeny, M.; Kevorkian, A.; Xu, J. M. (1996)
      Wavelength-division multiplexed (WDM) devices are becoming increasingly important for fiber-optics communication and sensing systems. Large-channel fanout, low loss, and compatibility with fiber connection, laser sources ...
    • Article  

      Superimposed multiple Bragg gratings 

      Othonos, Andreas S.; Lee, X.; Measures, R. M. (1994)
      The authors demonstrate the inscription of seven Bragg gratings at the same location on a photosensitive fibre. These superimposed Bragg gratings were written over a 60nm span in the region of 1530nm with reflectivities ...