Optical waveguides – With optical coupler – Particular coupling function
Reexamination Certificate
2007-06-05
2007-06-05
Nguyen, George B. (Department: 2112)
Optical waveguides
With optical coupler
Particular coupling function
C385S027000, C385S123000, C385S127000, C372S006000
Reexamination Certificate
active
11230905
ABSTRACT:
The specification describes an optical fiber device for propagating and recompressing high energy, ultrashort pulses with minimal distortions due to nonlinearity. The device is based on propagation in a higher order mode (HOM) of a few-moded fiber. Coupling into the HOM may be accomplished using long-period gratings. Features of the HOM fiber mode that are useful for high quality pulse compression include large effective area, high dispersion and low dispersion slope. In a preferred case the long period gratings go through a turn-around point (TAP) at the wavelength of operation.
REFERENCES:
patent: 2003/0002794 (2003-01-01), Ramachandran
patent: 2005/0100280 (2005-05-01), Ramachandran
patent: 959374 (1999-11-01), None
patent: 1499045 (2005-01-01), None
Bend Resistance of Large-Mode-Area Higher-Order-Mode Fibers, J. M. Fini and S. Ramachandran, 2006 IEEE/LEOS summer topical meeting on fibers for lasers.
S. Ramachandran, J. Nicholson, S. Ghalmi, M. Yan, P.Wisk, E.Monberg, and F. Dimarcello, “Robust, Single-Moded, Broadband Transmission and Pulse Compression in a Record Aeff (2100 um2) Higher-Order-Mode Fiber,” European Conference on Optical Communications p. Postdeadline Th4.4.1 (2005).
Nicholson Jeffrey
Ramachandran Siddharth
Furukawa Electric North America Inc.
Morra Michael A.
Nguyen George B.
Niu Xinning
Wilde Peter V.D.
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