Optical waveguides – Temporal optical modulation within an optical waveguide
Reexamination Certificate
2003-12-30
2008-08-12
Font, Frank G (Department: 2883)
Optical waveguides
Temporal optical modulation within an optical waveguide
C385S031000, C385S039000, C385S050000, C398S141000, C398S153000, C398S165000, C398S166000, C341S013000, C341S014000, C341S137000
Reexamination Certificate
active
07412116
ABSTRACT:
The invention relates to an optical device, apt to generate and process optical codes at least one wavelength, comprising P inputs s, with 1≦s≦P, and P≧1, and N outputs k, with 1≦k≦N and N≧1, characterized in that it is apt to simultaneously generate and process Nc≧2, made of C chips with time interval τ, with C≧2, characterized in that the transfer function Tsk(f) from the input s to the output k satisfies the following formula: where: Fvis a transfer function of an optical filter, for v=0, 1 . . . , V−1, avis a constant value, for v=0, 1, . . . , V−1 Sskis an integer number (SskεZ), Nkis a constant value, for k=2, . . . N, and V is a positive integer number with 1≧V≧log2N. The invention further relates to a set of optical codes, apt to be generated, in particular, by such optical device, and to networks and apparatus comprising such optical device.
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Lam Cedric F et al: “Experimental Demonstration of Spectrally Encoded Optical CDMA Systems Using Mach-Zehnder Encoder Chains” Confernce on Lasers and Elctro-Optics. Cleo '98. Techincal Digest. Conference Edition. San Francisco CA, May 3-8, 1998, OSA Techincal Digest Series, vol. 6, New York, NY . . . .
Min S-S et al: “Time-Wavelength Hybrid Optical CDMA System With Tunable Encoder/Decoder Using Switch and Fixed Delay-Line” Optics Communications, North-Holland Publishing Co. Amsterdam, NL, vol. 216, No. 4-6, Feb. 15, 2003, pp. 335-342 . . . .
Font Frank G
Lepisto Ryan
Universita′ Degli Studi “Roma Tre”
Young & Thompson
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