H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/18 (2006.01) H04B 10/155 (2006.01)
Patent
CA 2166829
An amplitude limiting circuit is utilized to select the most favorable linear region of the light vs. current characteristic curve (for directly modulated lasers) or the lasers modulator transfer function (for externally modulated lasers) by preventing excursions of the broadband, multiplexed input signal beyond selected upper and lower current or voltage limits. The clipped broadband signal is represented as a stationary Gaussian process to provide a reliable estimate of the carrier-to-nonlinear distortion per channel that would be experienced with a given laser or optical modulator. The distortion control technique of the present invention is equally applicable for both directly and externally modulated lasers. In a directly modulated system, for example, an amplitude limiter may be used to clip the multiplexed signal to prevent excursions below the threshold and/or above saturation and thereby avoid the unpredictable levels of nonlinear distortion associated therewith. Instead, the clipping levels can be set to achieve an acceptably low level of non-linear distortion.
Rainal Attilio Joseph
At&t Corp.
Kirby Eades Gale Baker
LandOfFree
System and method for minimizing nonlinear distortion in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for minimizing nonlinear distortion in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for minimizing nonlinear distortion in... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1958670