Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-12-18
2000-10-31
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359174, 359179, H04B 1000, H04B 1012
Patent
active
061411299
ABSTRACT:
The specification relates to a method and apparatus for all-optical regeneration of return-to-zero (RZ) data streams. The effect of self-phase modulation (SPM) of a data signal passing through a nonlinear medium (NLM) creates spectral broadening in individual data pulses which are then subsequently filtered to pass a selected bandwidth centered at a frequency, .omega..sub.f, which is shifted with respect to the input data carrier frequency, .omega..sub.0. Since the degree of broadening of a pulse passing through the NLM is a function of the initial intensity of the pulse, noise in data "zeros" (null values) possess insufficient intensity (providing incidental distortion pulse intensity attributable to accumulated process noise is less than a critical value) to cause the requisite amount of spectral broadening to encompass the selected filter bandwidth centered around .omega..sub.f, and the noise is subsequently suppressed. Conversely, noise (amplitude fluctuations) in data "ones" (set values) possess sufficient intensity (providing input pulse intensity, including incidental distortion pulse intensity, is greater than a critical value) to cause the requisite amount of spectral broadening to encompass the selected filter bandwidth centered around .omega..sub.f, and that portion of the spectrally broadened pulse contained within the bandwidth centered around .omega..sub.f is subsequently passed.
REFERENCES:
patent: 5760948 (1998-06-01), Bigo
patent: 5911015 (1999-06-01), Bigo
Bigo, Sebastien. "All-Optic Fiber Signal Processing and Regeneration for Soliton Communications", Oct. '97 IEEE Journal of Selected Topics In Quantam Electronics, vol. 3 No. 5, pp. 1208-1223.
Nakazawa M. "40 Gbit/s WDM soliton transmission over 10000 km using synchronous modulation and narrow band optical filtering", Apr. '96, Electronic Letters, vol. 32 No. 9, pp. 828-829.
Bello Agustin
Lucent Technologies - Inc.
Pascal Leslie
LandOfFree
Method and apparatus for all-optical data regeneration 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 apparatus for all-optical data regeneration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for all-optical data regeneration will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2059316