La presente invention concerne un connecteur de fibre optique universel comprenant un boitier (3)... more La presente invention concerne un connecteur de fibre optique universel comprenant un boitier (3) et un element de fixation de fibre (2) configure de maniere a fixer une fibre optique (1) dans le boitier (3). L'element de fixation (2) positionne la fibre optique (1) de maniere a ce qu'une face d'extremite (4) de la fibre (1) soit maintenue a l'interieur du boitier (3). La face d'extremite de la fibre est positionnee de maniere a ce qu'un faisceau lumineux (5) emanant de la face d'extremite de la fibre ait un front d'onde defini (9) situe au niveau d'une interface specifiee (8).
We report on a pulsed laser source whose wavelength can be switched between 585 nm, 600 nm, and 6... more We report on a pulsed laser source whose wavelength can be switched between 585 nm, 600 nm, and 616 nm. The pulses are approximately 1 nsec long, the repetition rate is 20 MHz, and the pulse energies are 25 to 50 nJ. The laser source uses a laser diode seed and a series of Yb-doped fiber amplifiers to generate pulsed
We derive analytic expressions for the Brillouin thresholds of square pulses in optical fibers. T... more We derive analytic expressions for the Brillouin thresholds of square pulses in optical fibers. The equations are valid for pulse durations in the transient Brillouin scattering regime (less than 100 nsec), as well for longer pulses, and have been confirmed experimentally. Our analysis also gives a firm theoretical prediction that the Brillouin gain width increases dramatically for intense pulses, from tens of MHz to one GHz or more.
Emission spectroscopy and laser-induced fluorescence have been used to monitor the field and tail... more Emission spectroscopy and laser-induced fluorescence have been used to monitor the field and tail-flame regions of a Hull-design 1 inductively coupled plasma. This plasma is used for a variety of syntheses 2,3 including SiC, TiC, BN, AlN and diamond. Temporallyand spatially-resolved spectra of both pure Ar and Ar/gas mixtures have been studied as a function of RF power, pressure and flow rate. Preliminary data suggest that the system is far from local thermodynamic equilibrium.
Abstract Rydberg oxygen atoms were produced in a dc glow discharge by laser excitation of metasta... more Abstract Rydberg oxygen atoms were produced in a dc glow discharge by laser excitation of metastable states. Transitions were detected via the optogalvanic effect. The observed states of these Rydberg atoms were found to be significantly perturbed and mixed by the electric field present in the discharge.
WC present a partial mechanism Lx excimGon and energy rransier irl a Ne/02 dc discharge. Atomic a... more WC present a partial mechanism Lx excimGon and energy rransier irl a Ne/02 dc discharge. Atomic and molecular concentrations are monilored via the ooroaalvanic errec~. A resonant Penning ionizaticn process is proposed for the produclion. I or 0; (a%",. u = 3). An oplogalvanic signal, due to atomic ppm.
La presente invention concerne un connecteur de fibre optique universel comprenant un boitier (3)... more La presente invention concerne un connecteur de fibre optique universel comprenant un boitier (3) et un element de fixation de fibre (2) configure de maniere a fixer une fibre optique (1) dans le boitier (3). L'element de fixation (2) positionne la fibre optique (1) de maniere a ce qu'une face d'extremite (4) de la fibre (1) soit maintenue a l'interieur du boitier (3). La face d'extremite de la fibre est positionnee de maniere a ce qu'un faisceau lumineux (5) emanant de la face d'extremite de la fibre ait un front d'onde defini (9) situe au niveau d'une interface specifiee (8).
We report on a pulsed laser source whose wavelength can be switched between 585 nm, 600 nm, and 6... more We report on a pulsed laser source whose wavelength can be switched between 585 nm, 600 nm, and 616 nm. The pulses are approximately 1 nsec long, the repetition rate is 20 MHz, and the pulse energies are 25 to 50 nJ. The laser source uses a laser diode seed and a series of Yb-doped fiber amplifiers to generate pulsed
We derive analytic expressions for the Brillouin thresholds of square pulses in optical fibers. T... more We derive analytic expressions for the Brillouin thresholds of square pulses in optical fibers. The equations are valid for pulse durations in the transient Brillouin scattering regime (less than 100 nsec), as well for longer pulses, and have been confirmed experimentally. Our analysis also gives a firm theoretical prediction that the Brillouin gain width increases dramatically for intense pulses, from tens of MHz to one GHz or more.
Emission spectroscopy and laser-induced fluorescence have been used to monitor the field and tail... more Emission spectroscopy and laser-induced fluorescence have been used to monitor the field and tail-flame regions of a Hull-design 1 inductively coupled plasma. This plasma is used for a variety of syntheses 2,3 including SiC, TiC, BN, AlN and diamond. Temporallyand spatially-resolved spectra of both pure Ar and Ar/gas mixtures have been studied as a function of RF power, pressure and flow rate. Preliminary data suggest that the system is far from local thermodynamic equilibrium.
Abstract Rydberg oxygen atoms were produced in a dc glow discharge by laser excitation of metasta... more Abstract Rydberg oxygen atoms were produced in a dc glow discharge by laser excitation of metastable states. Transitions were detected via the optogalvanic effect. The observed states of these Rydberg atoms were found to be significantly perturbed and mixed by the electric field present in the discharge.
WC present a partial mechanism Lx excimGon and energy rransier irl a Ne/02 dc discharge. Atomic a... more WC present a partial mechanism Lx excimGon and energy rransier irl a Ne/02 dc discharge. Atomic and molecular concentrations are monilored via the ooroaalvanic errec~. A resonant Penning ionizaticn process is proposed for the produclion. I or 0; (a%",. u = 3). An oplogalvanic signal, due to atomic ppm.
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Papers by GREGORY KEATON