Optical: systems and elements – Optical frequency converter
Reexamination Certificate
2004-04-15
2008-03-04
Sanghavi, Hemang (Department: 2874)
Optical: systems and elements
Optical frequency converter
C372S021000, C372S022000, C398S078000
Reexamination Certificate
active
07339717
ABSTRACT:
A method and device are provided for automatically generating a key and a conjugate key to be used in an optical code division multiple access system. The method comprises applying a down conversion process to pump input light to thereby produce down converted broadband signal and idler fields that are complex conjugates of each other. The signal and idler fields thus serve as the key and its conjugate. Also provided according to the invention is a method for use in coding/decoding a signal in an optical code division multiple access system.
REFERENCES:
patent: 4866699 (1989-09-01), Brackett et al.
patent: 5177768 (1993-01-01), Crespo et al.
patent: 5784506 (1998-07-01), Pfeiffer
patent: 5867290 (1999-02-01), Dutt et al.
patent: 6025944 (2000-02-01), Mendez et al.
patent: 6236483 (2001-05-01), Dutt et al.
patent: 2002/0126370 (2002-09-01), Broderick et al.
patent: 2002/0163696 (2002-11-01), Huang et al.
patent: 2003/0147655 (2003-08-01), Shattil
patent: 2004/0037500 (2004-02-01), Yoo
patent: 2007/0147734 (2007-06-01), Cincotti
L. Mandel and E. Wolf, Optical coherence and quantum optics, 22:1069-1108, Cambridge University Press (1995).
G. D. Boyd and D. A. Kleinman, Parametric interaction of focused Gaussian light beams,J. Appl. Phys., 39:3597-3639 (1968).
T. G. Giallorenzi and C. L. Tang, Quantum theory of spontaneous parametric scattering of intense light,Phys. Rev., 166:225-233 (1968).
C. K. Hong and L. Mandel, Theory of parametric frequency down conversion of light,Phys. Rev. A., 31:2409-2418 (1985).
I. Abram, R. K. Raj, J. L. Oudar and G. Dolique, Direct observation of the second-order coherence of parametrically generated light,Phys. Rev. Lett., 57:2516-2519 (1986).
G. Bjork and Y. Yamamoto, Phase correlation in nondegenerate parametric oscillators and amplifiers: Theory and applications,Phys. Rev. A., 37:1991-2006 (1988).
B. Huttner, S. Serunik and Y. Ben-Aryeh, Quantum analysis of light propagating in a parametric amplifier,Phys. Rev. A., 42:5594-5600 (1990).
I. Abram and E. Cohen, Quantum theory for light propagation in a nonlinear effective medium,Phys. Rev. A., 44:500-517 (1991).
A. Joobeur, B. E. A. Saleh, T. S. Larchuk and M. C. Teich, Coherence properties of entangled light beams generated by parametric down-conversion: Theory and experiment,Phys. Rev. A., 53:4360-4371 (1996).
A. M. Weiner, Femtosecond pulse shaping using spatial light modulators,Rev. Sci. Instrum., 71:1929-1960 (2000).
J. A. Salehi, A. M. Weiner and J. P. Heritage, Coherent ultrashort light pulse code-division multiple access communication systems,Journal of Lightwave Technology, 8:478-491 (1990).
M. E. Marhic, Coherent optical CDMA networks,Journal of Lightwave Technology, 11:854-863 (1993).
H. P. Sardesai, C. C. Chang and A. M. Weiner, A femtosecond code-division multiple-access communication system test bed,Journal of Lightwave Technology, 16:1953-1964 (1998).
H Fathallah, L. A. Rusch and S. LaRochelle, Passive optical fast frequency-hop CDMA communication system,Journal of Lightwave Technology, 17:397-405 (1999).
M. Kavehrad, Optical code division-multiplexed systems based on spectral encoding of noncoherent sources,Journal of Lightwave Technology, 13:534-545 (1995).
L. Nguyen, T. Dennis, B. Aazhang and J. F. Young, Experimental demonstrationof bipolar codes for optical spectral amplitude CDMA communication,Journal of Lightwave Technology, 15:1647-1653 (1997).
A. J. Mendez, R. M. Gagliardi, H. X. C. Feng, J. P. Heritage and J. M. Morookian, Strategies for realizing optical CDMA for dense, high-speed, long span, optical network applications,Journal of Lightwave Technology, 18:1683-1695 (2000).
Natarajan, B. et al., High-performance MC-CDMA via carrier interferometry codes,IEEE Trans. Veh Tech., 50(6)1344-1353 (Nov. 2001).
Pe'er Avi et al., Optical direct sequence spread spectrum and code division multiplexing using broadband, parametrically generated light,Journal of Lightwave Technology, 22(6)1-9 (Jun. 2004).
Novero, C., “Biphoton Electromagnetic Fields and their Applications”; The Radio Science Bulletin, No. 304, Mar. 2003, pp. 5-16, XP002402230.
Dayan Barak
Friesem Asher A
Peer Avi
Silberberg Yaron
Browdy and Neimark PLLC
Sanghavi Hemang
Yeda Research and Development Company Ltd.
LandOfFree
Method and system for use in optical code division multiple... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for use in optical code division multiple..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for use in optical code division multiple... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3969020