Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2007-03-13
2007-03-13
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Particular coupling structure
C385S027000, C385S028000, C385S031000, C385S039000, C385S043000, C385S123000, C385S124000
Reexamination Certificate
active
10817732
ABSTRACT:
A compact, inexpensive and rugged fiber collimating lens and lens array achieve large beam diameters and provide long working distances. A special single-mode fiber is inserted between a standard single-mode input fiber and a GRIN fiber lens, typically quarter-pitch or slightly longer. The specialty fiber condenses the mode field diameter (MFD) of the beam in the input fiber into its smaller MFD. As a result, the fiber collimating lens provides greater beam expansion due to the larger divergence angle of the specialty fiber, which in turn provides longer working distances.
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Jiang Shibin
Li Maohe
Beamtek, Inc.
Font Frank G.
Gifford Eric A.
Mooney Michael P.
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