Optical: systems and elements – Optical amplifier – Optical fiber
Reexamination Certificate
2006-05-28
2008-10-14
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Optical fiber
C359S341500, C385S126000
Reexamination Certificate
active
07436585
ABSTRACT:
A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some fiber lasers and amplifiers having large cores problems exist related to energy being generated at multiple-modes (i.e., polygamy), and of mode hopping (i.e., promiscuity) due to limited control of energy levels and fluctuations. The problems of multiple-modes and mode hopping result from the use of large-diameter waveguides, and are addressed by the invention. This is especially true in lasers using large amounts of energy (i.e., lasers in the one-megawatt or more range). By using multiple small waveguides in parallel, large amounts of energy can be passed through a laser, but with better control such that the aforementioned problems can be reduced. An additional advantage is that the polarization of the light can be maintained better than by using a single fiber core.
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Brooks Christopher D.
Di Teodoro Fabio
Aculight Corporation
Bolda Eric
Lemaire Charles A.
Lemaire Patent Law Firm, P.L.L.C.
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