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  • Fiber Optic Strain Monitoring for Gas Pipelines
    Jewell Instruments has recently began monitoring a critical. gas pipeline in a notoriously active landslide zone. Using fiber-optics in conjunction with. traditional vibrating wire equipment, the monitoring regime runs over a 440 meter stretch of pipe, and provides detailed strain and temperature
  • Bending Induced PMD in Spun Erbium Doped Fiber (.pdf)
    With a growing number of systems running at 10 Gbit/s and large interest in 40 Gbit/s systems, there is increased focus on Polarization Mode Dispersion (PMD). Even though EDF amplifiers only consist of tens of meters of EDF, the PMD tolerance on the fiber is tight. But measuring the correct PMD
  • Case Study - Harper's Advanced Carbon Fiber Pilot Line at ORNL
    Oak Ridge National Laboratory is home to the Department of Energy's Carbon Fiber Technology Facility (CFTF) which houses this 390-ft / 118-meter advanced process line, provided by Harper International. Harper was selected for the DOE contract due to its capability to successfully design
  • Simultaneous Connection and Powering of IP Surveillance Cameras in a Toy Factory
    A European toy manufacturer built a new campus that included office, manufacturing and warehouse space. As copper Ethernet cable has a range limitation of around 100 meters, the manufacturer used multi-mode fiber to network the three new buildings. Multi-mode fiber provided the necessary range
  • Continuous Fuel Identification for Pipelines with a ClearView TM Photometer
    Reliable, affordable, real-time identification of petroleum products flowing in pipelines to minimize waste and assist in transitions. Experimental: ClearView TM fiber optic filter photometer. Fiber optic flow probe with 1 cm optical path. Pair of 2 meter low-0H fiber optic cables. Near-infrared
  • Ethylene: Diethylene Glycols On-Line Monitoring with a ClearView TM Photometer
    closely related compounds. As a result, it is often thought that a process GC is required. Experimental: Our PS¬-2E diode array spectrometer was used to measure the NIR spectra of ethylene:diethylene glycol (EG:DEG) mixtures. Two meters of low-OH fiber optic cables were used and the samples were
  • Teaching Analog New Tricks
    , and auto-ranging must be disabled for the results to make sense. These limitations have made optical metrology a perennial bottleneck in applications as diverse as scanned-probe microscopy, fiber alignment, device characterization, laser cavity optimization, fluorescence studies and laser spectroscopy.
  • Wired 9.08: Beam On
    arsenide, which produces a longer, 980-nanometer infrared beam. Used in an erbium-doped amplifier, a pump laser fires its beam down a 100-meter optical fiber that terminates in an impregnated segment. The beam excites the erbium atoms, which then add their energy to optical data signals passing

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