Laser beam injecting optical device for optical fiber
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United States of America Patent
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Issued Date -
Jan 24, 2008
app pub date -
Jul 19, 2007
filing date -
Jul 19, 2006
priority date (Note) -
Abandoned
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Abstract
In a shielding case, a condenser lens condenses a laser beam output by a laser oscillator to inject the laser beam into an entrance end face of an optical fiber disposed posterior to a focusing point of the laser beam. Ventilation of an ambient gas in the shielding case is carried out by ventilating means, and the ambient gas bringing about ionization in the vicinity of the focusing point of the laser beam is eliminated, thereby preventing the outbreak of air breakdown.
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