High efficiency optical amplifying fiber
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United States of America Patent
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Oct 16, 2007
Grant Date -
Nov 2, 2006
app pub date -
Mar 30, 2005
filing date -
Apr 2, 2004
priority date (Note) -
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Abstract
A small size and high efficiency laser oscillation apparatus capable of obtaining high output and high beam quality laser light is provided. First waveguide (21) (refractive index=n1) for transmitting excitation light, second waveguide (22) composed of core (23) (refractive index=n3) for generating laser light and clad (24) (refractive index=n2) for transmitting the excitation light, and third waveguide (25) (refractive index=n4) including first waveguide 21 and second waveguide 22 are provided. Light amplifying fiber (20), in which the refractive indices are set so as to satisfy the relation: n1
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