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We report a fiber hydrogen sensor for low-temperature operation. The low-temperature response time of palladium-coated fiber Bragg grating in high attenuation fiber is enhanced by 40 times with in-fiber laser heating.
We report a backward-wave spontaneous-Raman multi-gas sensor employing a hollow-core photonic-bandgap-fiber to contain gasses and increase interaction length. Silica Raman noise and detection speed are reduced using a digital spatial filter and a cladding seal.
This paper presents a rapid wavelength modulation of a distributed feedback laser using a piezo-electric actuator. The laser power was passively stabilized in a ring cavity. Wavelength modulation absorption spectroscopy was demonstrated for C2H2 sensing.
The output power from spontaneous gas-phase Raman scattering is enhanced using a hollow-core photonic crystal fiber for the gas cell and Stokes light collector, yielding ≫100 times enhancement over a free-space configuration.
The output power from spontaneous gas-phase Raman scattering is enhanced using a hollow-core photonic crystal fiber for the gas cell and Stokes light collector, yielding ≫100 times enhancement over a free-space configuration.
The output power from spontaneous gas-phase Raman scattering is enhanced using a hollow-core photonic crystal fiber for the gas cell and Stokes light collector, yielding >100 times enhancement over a free-space configuration.
Numerous industrial and military applications require remote sensing of various machine and equipment operating parameters in locations where traditional power sources may not be available and long periods of unattended operation are required. Quite often, however, some source of vibrating energy may be present in operation of the machine in question. Herein, a piezoelectric source is efficiently...
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