Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2008-05-06
2008-05-06
Tran, Dzung (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S184000, C398S192000
Reexamination Certificate
active
09865028
ABSTRACT:
An optical processing method includes: receiving an optical signal from an optical system, wherein the optical signal is distorted by frequency-dependent polarization effects in the optical system; spatially dispersing frequency components of the distorted optical signal on a spatial light modulator (SLM); and independently adjusting the polarization transfer matrix of multiple regions of the SLM to reduce the distortion of the optical signal. A related optical processing method includes: providing a precompensation signal indicative of frequency-dependent polarization effects in a downstream optical system; spatially dispersing frequency components of an optical signal on a spatial light modulator (SLM); and independently adjusting the polarization transfer matrix of multiple regions of the SLM to at least partially precompensate the optical signal for distortions caused by the frequency-dependent polarization effects in the downstream optical system. Another related optical processing method includes: providing a model of the frequency-dependent polarization effects; spatially dispersing frequency components of the optical signal on a spatial light modulator (SLM); and independently adjusting the polarization transfer matrix of multiple regions of the SLM based on the model to emulate the optical signal transmission.
REFERENCES:
patent: 4193691 (1980-03-01), Fjarlie
patent: 5037173 (1991-08-01), Sampsell et al.
patent: 5090807 (1992-02-01), Tai
patent: 5504575 (1996-04-01), Stafford
patent: 5535029 (1996-07-01), Clark
patent: 5719650 (1998-02-01), Wefers et al.
patent: 5808800 (1998-09-01), Handschy et al.
patent: 5847788 (1998-12-01), Hashimoto
patent: 5867291 (1999-02-01), Wu et al.
patent: 5946116 (1999-08-01), Wu et al.
patent: 6031588 (2000-02-01), Dultz et al.
patent: 6111700 (2000-08-01), Kobayashi et al.
patent: 6219360 (2001-04-01), Komine
patent: 6273571 (2001-08-01), Sharp et al.
patent: 6275623 (2001-08-01), Brophy et al.
patent: 6327068 (2001-12-01), Silberberg et al.
patent: 6385357 (2002-05-01), Jopson et al.
patent: 6421153 (2002-07-01), Way et al.
patent: 6504943 (2003-01-01), Sweatt et al.
patent: 6556320 (2003-04-01), Cao
patent: 6671464 (2003-12-01), Kikuchi
patent: WO01/04674 (2001-01-01), None
Phase-dominant spatial light modulators, Horner, J.L.; Soref, R.A.; Electronics Letters , vol. 24 , Issue: 10 , May 12, 1988 pp. 626-627.
“SLM-based optical crossbars based on the matrix-matrix principle,” White, H.; Stace, C.; Birch, M.J.; Walker A.C.; Taghizadeh, M.R.; Hall, T.J.; Crossland, W.A.; Optical Switching, IEE Colloquium on , Jun. 3, 1993 pp. 2/1-2/7.
“Trends in knowledge base processing using optical techniques,” Kottas, J.A.; Warde, C.; Systems, Man and Cybernetics, 1989. Conference Proceedings., IEEE International Conference on , Nov. 14-17, 1989 pp. 1250-1257 vol. 3.
“Four-level, phase only, spatial light modulator,” Broomfield, S.E.; Neil, M.A.A.; Paige, E.G.S.;□□Electronics Letters , vol. 29 , Issue: 18 , Sep. 2, 1993 pp. 1661-1663□□.
“Liquid crystal-based optical time delay units for phased array antennas,” Riza, N.A.;□□Lightwave Technology, Journal of , vol. 12 , Issue: 8 , Aug. 1994 pp. 1440-1447.
“A femtosecond pulse-shaping apparatus containing microlens arrays for use with pixellated spatial light modulators,” Mahoney, K.M.; Weiner, A.M.; Quantum Electronics, IEEE Journal of , vol. 32, Issue: 12 , Dec. 1996 pp. 2071-2077.
“Optical computing,” Ansari, N.I.; Athreya, M.S.; Gutta, S.V.R.; Potentials, IEEE ,vol. 11 , Issue: 4 , Dec. 1992 pp. 33-36.
Gerard J. Foschini et al., “The Statistics of PMD-Induced Chromatic Fiber Dispersion,” Journal of Lightwave Technology, 17:9:1560-1565, Sep. 1999.
Wefers et al., “Generation of High-Fidelity Programmable Ultrafast Optical Waveforms,” Optics Letters, 20:9:1047-1049, May 1, 1995.
Weiner et al., “High-Resolution Femtosecond Pulse Shaping,”Journal of the Optical Society of America B, 5:8:1563-1572, Aug. 1988.
Weiner et al., “Programmable Shaping of Femtosecond Optical Pulses by Use of 128-Element Liquid Crystal Phase Modulator,” IEEE Journal of Quantum Electronics, 28:4:908-920, Apr. 4, 1992.
Zhizhong Zhuang et al., “Polarization Controller Using Nematic Liquid Crystals,” Optical Letters, 24:10:694-696, May 15, 1999.
Chang et al., “Higher-Order Fiber Dispersion Compensation Using a Pulse Shaper with a Programmable Phasae-Modulator Array,” OFC '98. Optical Fiber Communication Conference and Exhibit. Technical Digest. Conference Edition. 1988 OSA Technical Digest Series vol. 2 (IEEE Cat. No. 98CH36177), pp. 75-76.
Weiner, “Femtosecond Optical Pulse Shaping and Processing,” Prog. Quant. Electr. 1995, vol. 19, pp. 161-237.
Fish & Richardson P.C.
Purdue Research Foundation
Tran Dzung
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