Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-07-15
2000-05-23
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359188, 359140, H04B 1004
Patent
active
060671807
ABSTRACT:
Data carrying optical signals are subjected to equalization or pulse shaping of the optical signal waveform. A plurality of optical tap signals derived from the optical signal are used to control a modulator operating on an input signal to provide an output signal having the desired waveform. A Mach-Zehnder interferometer having semiconductor optical amplifiers in each arm provides modulation by the effect of cross modulation induced by propagating the respective tap signals through a selected one of the semiconductor optical amplifiers. Various forms of transversal filter are provided by selecting the number of optical taps, assigning positive or negative weights and appropriate delays. The effects of dispersion in optical signals can be mitigated by utilizing optical taps with negative weights to subtract tail portions from the leading and trailing edges of a signal pulse. The invention has application to systems with high bit rates where equalization or pulse shaping in the electrical domain is difficult to implement.
REFERENCES:
patent: 4262992 (1981-04-01), Berthold, III
patent: 4997249 (1991-03-01), Berry et al.
patent: 5408500 (1995-04-01), Ginzburg et al.
patent: 5428697 (1995-06-01), Dolfi et al.
patent: 5473457 (1995-12-01), Ono
patent: 5798852 (1998-08-01), Billes et al.
patent: 5900956 (1999-05-01), Cotter
IEEE Phototonics Technology Letters, vol. 7, No. 11, Nov. 1995 "Optimal Conditions for High-Speed All-Optical SOA-Based Wavelength Shifting", W. Shieh and A. E. Willner.
IEEE Phototonics Technology Letters, vol. 8, No. 9, Sep. 1996 "10Gb/s Wavelength Conversion with Integrated Multiquantum-Well-Based 3-Port Mach-Zehnder Interferometer", W. Idler, K. Daub, G. Laube et al.
Journal of Lightwave Technology, vol. 10, No. 8, Aug. 1992, "Performance of Smart Lightwave Receivers with Linear Equalization", John C. Cartledge, Ross G. Mckay and Mark C. Nowell.
Nortel Networks Corporation
Pascal Leslie
LandOfFree
Equalization, pulse shaping and regeneration of optical signals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Equalization, pulse shaping and regeneration of optical signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Equalization, pulse shaping and regeneration of optical signals will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1841118