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Journals and Conferences
We report spontaneous emission enhancement of Raman scattering from CO<sub>2</sub> and O<sub>2</sub> gases in a ≈30 μm-long Fabry-Perot microcavity with a mode volume of 200 μm<sup>3</sup> and a peak finesse of 50 000.
The feasibility of using a severely aberrated pump beam to amplify effectively without distortion a diffraction-limited Raman beam has been studied. In these experiments the XeCl laser served as the pump and H(2) as the Raman medium. Degradation of the amplified Stokes beam quality with increase in the Raman gain was observed and measured.
We have demonstrated a room-temperature laser on the (6)H(13/2) - (6)H(15/2) transition of Dy(3+) in Dy:BaYb(2)F(8) at 3.40 mum . A pulsed 1.3-microm Nd:YAG laser was used as the pump. Our measured spontaneous-emission spectrum for the (6)H(13/2) - (6)H(15/2) band indicates that this laser should be continuously tunable between 3.0 and 3.4 mum .
New families of gas lasers are expected to deliver a range of pulse intensities, durations, and wavelengths for diverse applications.
The feasibility of using a multi-MeV He(+)-ion beam to convert the outer portion of a crystal fiber into cladding is demonstrated. When applied to a-axis LiNbO(3) fiber, the resulting structure has been found to show good waveguiding characteristics.
The output from a discharge-pumped XeCl laser (75-mJ, 25-nsec FWHM at 308 nm) has been converted to several wavelengths in the visible spectrum through stimulated electronic Raman scattering in vapors of Ba, Ti, Pb, and Bi. Energy-conversion efficiencies of up to 40%6 have been reached in initial experiments.
A fiber-optic contact microsoldering device was demonstrated. It consists of a crystalline fiber with a tapered absorbing tip grown directly onto one end. A tapered tip with a 20-mum end enables the soldering of components with lead spacing as small as 50 mum.
We report the measurement of degenerate coherent anti-Stokes Raman scattering (CARS) in a high-finesse optical microcavity, with an atmospheric gas as the nonlinear medium. Unlike the well-known bulk process in which index-dispersion compensation is required for phase-matching, efficient microcavity CARS involves a resonant coupling at the Stokes, pump, and… (More)