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  • Fiber Optics Devices Based on VHGs
    We report on Volume Bragg Grating (VBG) technology for a spectrum of applications in optical components ranging from fixed or tunable filters, ROADM, beam combiners and pump stabilizers. VBGs allow higher integration and added functionality than Fiber Bragg Gratings. Volume Bragg Grating (VBG
  • Fiber Optic Sensing Solutions for the FAA
    gages (CSG) and asphalt. strain gages (ASG). Recently, the FAA has investigated the. use of fiber optic (Fiber Bragg Grating) string arrays that. Figure 1. FAA Test Facility Vehicle. provide static or dynamic strain response of pavement test. sections under test vehicle loading or fal ing weight
  • Advances in Near Field Holographic Grating Mask Technology
    also been applied to fiber grating device fabrication.56 Use of direct write e-beam1"' and ion-beam2 lithography have been shown to be a flexible way to generate these masks and to include systematic pitch changes [as may be required for wavelength division multiplexing (WDM) com¬munication systems
  • High Power 7-GHz Bandwidth External-Cavity Diode Laser Array and its Use in Optically Pumping Singlet Delta Oxygen (.pdf)
    Using a 14mm thick volume Bragg grating, spectral bandwidth of a cw-operated diode laser array is narrowed to 7GHz 9FWHM). High power 7-GHz bandwidth external-cavity. diode laser array and its use in optically. pumping singlet delta oxygen. Lei S. Meng, Boris Nizamov, Pratheepan Madasamy i, Jason K
  • A Comparison: Electrical or Optical Strain Gages
    . The gage factor for electrical strain gages thus is usually about 2. Very. small strain gages have a smaller gage factor, because with these strain gages the effect of the. change in electrical resistance resulting from strain is smaller. Fiber Bragg sensors are based on a Bragg grating which
  • High-Performance Wavelength-Locked Diode Lasers (.pdf)
    the problem in our grating-locked diode laser products. These results are expected to enable. improved performance in diode-pumped solid state and fiber laser systems. Keywords: Diode laser, semiconductor laser, narrow linewidth, wavelength locking, Bragg grating, Er:YAG, Nd:YAG. 1. MOTIVATION
  • Introduction to Volume Holographic Gratings (VHG)
    ), the Bragg condition of a VHG is defined as: k k. G , where. i. d. the magnitude of the incident and diffracted wave vectors inside the medium are. k. k. 2 n. i. d. with angles θin, θdn inside the medium. The grating vector magnitude is. given by G 2. , with grating period Λ. Figure 2. Bragg
  • Challenges in Photonics Manuafacturing
    for harsher motions such as sawtooth-waves. Elimination of structural resonances results in higher-fidelity Bragg gratings: narrower channel widths, higher efficiency. Air-bearing/piezo stage from Dover Instruments Inc., Westboro, Mass., employs vibration nullification in the manufacture of Fiber

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