Fiber laser oscillator and fiber laser processing apparatus
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United States of America Patent
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Apr 15, 2008
Grant Date -
Oct 4, 2007
app pub date -
Mar 22, 2007
filing date -
Mar 31, 2006
priority date (Note) -
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Abstract
An end cap is formed as a substantially cylindrical body having substantially the same diameter as an external diameter of a retaining unit of an oscillation fiber; a base end surface is integrally fusion-welded or fusion-bonded to one end surface of the oscillation fiber; and a leading end surface is obliquely cut relative to the light axis. A returning oscillating beam reflected by an optical resonator mirror is converged and made incident on a core end surface of the oscillation fiber 22 located at a focus position of an optical lens. However, since the core end surface is integrally bonded with the end cap and is not exposed to the atmosphere, the core end surface is not burned or deteriorated by the light energy of the oscillating beam.
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