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  • Introduction to Volume Holographic Gratings (VHG)
    satisfies the Bragg phase matching condition[1] it is diffracted by the periodic perturbation. Due to their high wavelength and angle sensitivity, and large information capacity and. bandwidth, VHG's have been investigated intensively and developed for applications such as. data storage, optical correlators
  • High Spatial Resolution Measurement of Volume Holographic Gratings
    . They are used in applications such as optical filtering,2 holographic. optical memory,3,4 image processing,5 and others. In addition, volume gratings Bragg-matched to reflect at normal. incidence have been used successfully to stabilize and lock the wavelength of semiconductor laser diodes.6
  • A Comparison: Electrical or Optical Strain Gages
    fibers are used for optical strain gages from HBM. In comparison to electrical strain. gages, optical strain gages tolerate substantially higher peak loads and provide a resistance to. alternating loads that is higher by orders of magnitude. Earlier investigations [3] have shown that fiber. Bragg
  • 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 Laser Welding of High Integrity Implantable Medical Devices
    . The mirrors. Pulse-to-pulse Stability. are fiber optical elements, so called Fiber Bragg. Gratings, which are also spliced to the laser fiber. A. Pulse-to-pulse stability is a good measure of how a. spliced-in power pickup in the form of a tap coupler. laser performs when modulated. Fig. 6 shows
  • High Power 7-GHz Bandwidth External-Cavity Diode Laser Array and its Use in Optically Pumping Singlet Delta Oxygen (.pdf)
    and the reflectivity is. about 25%. The light-passing surfaces on microlenses and VBG are all AR coated. DLA. FAC SAC. VBG. FA. a. 14 mm. SA. b. Fig. 1. Structure of external-cavity diode laser array (ECDLA). A volume Bragg grating (VBG). is used to provide narrow-band optical feedback to a diode
  • Preface
    The dramatic reduction in transmission loss of optical fibers coupled with very important developments in the area of light sources and detectors have resulted in phenomenal growth of the fiber optic industry during the last 35 years or so. Indeed,. the birth of optical fiber communication systems
  • High-Performance Wavelength-Locked Diode Lasers (.pdf)
    . In this work, we detail nLIGHT’s progress in the development and commercialization of wavelength-locked high-power. diode lasers, with results presented at 885-nm and 1532-nm. Leveraging our expertise in precision optical alignment,. our approach utilizes external feedback by means of volumetric Bragg