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29 Apr 2015TL;DR: In this article, the laser beam is focused and directed at the amorphous metal material with a beam spot size of about 30 microns or less, and the focused laser beam and the material are moved relative to each other at a speed greater than about 18 inches per second.
Abstract: Laser cutting systems and methods are used to cut amorphous metal materials, such as thin amorphous metal ribbons or foils, with a relatively high speed. Embodiments of laser cutting systems and methods described herein also allow cutting with reduced crystallization, and thus reduced increases in thickness, at the cut edges and with reduced cracks or other cutting defects at the cut edges. A fiber laser, such as an Ytterbium fiber laser, is used to generate a laser beam with a power level greater than about 50 W. The laser beam is focused and directed at the amorphous metal material with a beam spot size of about 30 microns or less. The focused laser beam and the amorphous metal material are moved relative to each other at a speed greater than about 18 inches per second such that the focused laser beam cuts the amorphous metal material.
4 citations
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15 Jul 2016TL;DR: A universal fiber optic connector includes a housing and a fiber attachment element configured to attach an optical fiber in the housing as mentioned in this paper, where the attachment element positions the optical fiber such that an end face of the fiber is held within the housing.
Abstract: A universal fiber optic connector includes a housing and a fiber attachment element configured to attach an optical fiber in the housing. The attachment element positions the optical fiber such that an end face of the fiber is held within the housing. The fiber end face is positioned such that a beam of light emerging from the fiber end face has a defined wavefront located at a specified interface.
4 citations
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09 Jan 2013TL;DR: In this article, a method for converting the optical frequency of a single-mode, single-frequency laser source was proposed, where the seed laser was a diode laser configured to adjust the frequency in response to controllable pump current variations.
Abstract: A method for converting the optical frequency of a single-mode, single-frequency laser source includes generating a linearly-polarized single-frequency seed laser signal at a fundamental frequency; amplifying the seed laser signal in an optical amplifier; coupling the amplified signal into an external cavity formed by at least two mirrors, one of the mirrors being installed on a piezo actuator; enhancing the coupled signal inside the external cavity by locking a resonance frequency of the cavity to the frequency of the seed laser by continuously adjusting the optical length of the cavity with the piezo actuator; and converting the frequency of the enhanced signal using a non-linear crystal placed in a beam path inside the cavity. A method for converting the optical frequency of a single-mode, single-frequency laser source, includes generating a linearly polarized single-frequency seed laser signal at a fundamental frequency, the seed laser being a diode laser configured to adjust the frequency in response to controllable pump current variations; amplifying the seed laser signal in an optical amplifier; coupling the amplified signal into an external cavity formed by at least two mirrors; enhancing the coupled signal inside the external cavity by locking the frequency of the diode seed laser to a resonance frequency of the cavity by continuously adjusting the pump current of the diode seed laser; and converting the frequency of the enhanced signal using a non-linear crystal placed in a beam path inside the cavity.
4 citations
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03 Jun 2014TL;DR: In this paper, a multimode fiber oscillator is configured with MM active fiber doped with, light emitters, a pair of MM passive fibers spliced to respective opposite ends of the active fiber, and a plurality of MM fiber Bragg gratings written in respective cores of the passive fibers to provide a resonant cavity.
Abstract: A multimode ("MM") fiber oscillator is configured with MM active fiber doped with, light emitters, a pair of MM passive fibers spliced to respective opposite ends of the MM active fiber, and a plurality of MM fiber Bragg gratings ("FBG") written in respective cores of the MM passive fibers to provide a resonant cavity. The passive and active fibers are configured with respective cores which are dimensioned with respective diameters matching one another and substantially identical numerical apertures.
4 citations
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01 Jul 2015TL;DR: In this article, a quasi-continuous wave fiber laser source is configured with a film irradiating pulsed beam, and the pulse energy, pulse duration of each pulse and the PRR are controlled so that each packet has a desired packet temporal power profile (W/cm2).
Abstract: The inventive system for crystallizing an amorphous silicon (a-Si) film is configured with a quasi-continuous wave fiber laser source operative to emit a film irradiating pulsed beam. The fiber laser source is operative to emit a plurality of non-repetitive pulses incident on the a-Si. In particular, the fiber laser is operative to emit multiple discrete packets of film irradiating light at a burst repetition rate (BRR), and a plurality of pulses within each packet emitted at a pulse repetition rate (PRR) which is higher than the BRR. The pulse energy, pulse duration of each pulse and the PRR are controlled so that each packet has a desired packet temporal power profile (W/cm2) and packet energy sufficient to provide transformation of a-Si to polysilicon (p-Si) at each location of the film which is exposed to at least one packets.
4 citations
Authors
Showing all 903 results
Name | H-index | Papers | Citations |
---|---|---|---|
Claude J. Allègre | 106 | 327 | 35092 |
Paul Tapponnier | 99 | 294 | 42855 |
Francesco Mauri | 85 | 352 | 69332 |
Barbara Romanowicz | 67 | 284 | 14950 |
Geoffrey C. P. King | 64 | 157 | 17177 |
Yi-Gang Xu | 64 | 271 | 14292 |
Jérôme Gaillardet | 63 | 199 | 14878 |
François Guyot | 61 | 292 | 12444 |
Georges Calas | 60 | 266 | 10901 |
Ari P. Seitsonen | 59 | 212 | 45684 |
Michele Lazzeri | 58 | 140 | 57079 |
Bernard Bourdon | 58 | 118 | 9962 |
Gianreto Manatschal | 56 | 200 | 10063 |
Nikolai M. Shapiro | 56 | 154 | 15508 |
Guillaume Morin | 55 | 156 | 7218 |