Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2011-05-10
2011-05-10
Le, Uyen-Chau N (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling structure
C385S015000, C385S092000, C385S093000, C359S341300
Reexamination Certificate
active
07941019
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
Chu Chris H
Le Uyen-Chau N
Lemaire Charles A.
Lemaire Patent Law Firm, P.L.L.C.
Lockheed Martin Corporation
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