Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2006-06-27
2006-06-27
Lee, John D. (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S024000, C385S003000, C398S078000, C398S190000
Reexamination Certificate
active
07068881
ABSTRACT:
An optical code-division multiple-access (O-CDMA) apparatus, network, and communications method. A transmitter data modulates a sequence of ultra-fast (˜1 ps) pulses. An encoder wavelength demultiplexes the pulses, separately phase-modulates the wavelength components according to a first CDMA code and wavelength multiplexes for transmission on an optical network. A receiver includes a decoder performing similar demultiplexing, phase-modulating according to a second CDMA code, and multiplexing. The receiver detects the resultant signal. If the two CDMA codes match, the detected signal replicates the data-modulated pulses. The apparatus may be formed in as few as one substrate. The encoder/decoder structure may be used to compensate the dispersion of a fiber. A short-pulse detector includes a Mach-Zehnder interferometer having two semiconductor amplifier regions in its two arms with differential delay/phase between them. A probe signal and the signal to be detected are both split into the arms together and thereafter differenced on the output.
REFERENCES:
patent: 4866699 (1989-09-01), Brackett et al.
patent: 4928316 (1990-05-01), Heritage et al.
patent: 6025944 (2000-02-01), Mendez et al.
patent: 6628864 (2003-09-01), Richardson et al.
patent: 2002/0105705 (2002-08-01), Turpin et al.
patent: 2003/0058504 (2003-03-01), Cho et al.
patent: 2003/0147116 (2003-08-01), Shpantzer et al.
patent: 2003/0147646 (2003-08-01), Zitelli
patent: 2003/0147655 (2003-08-01), Shattil
patent: 2004/0047543 (2004-03-01), Hiironen et al.
patent: 2005/0053377 (2005-03-01), Yoo
patent: 2005/0084266 (2005-04-01), Pohjola et al.
M. C. Chia et al., “Packet loss and delay performance of feedback and feed-forward arrayed-waveguide gratings-based optical packet switches with WDM inputs-outputs”,Journal of lightwave technology, vol. 19, No. 9, Sep. 2001, pp. 1241-1254.
T. Baba et al., “Photonic crystal light deflection devices using the superprism effect”,IEEE journal of quantam electronics, vol. 38, No. 7, Jul. 2002, pp. 909-914.
Lee John D.
Park Vaughan & Fleming LLP
The Regents of the University of California
Wood Kevin S.
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