Suppression of noise and distortion in fiber-optic systems

Details Suppression of noise and distortion in fiber-optic systems Suppression of noise and distortion in fiber-optic systems

H - Electricity

04

B

H04B 10/18 (2006.01)

Patent

CA 2096795

SUPPRESSION OF NOISE AND DISTORTION IN FIBER-OPTIC SYSTEMS Abstract of the Disclosure Noise and distortion due to scattering and reflection in a fiber-optic communications system are suppressed by modulating the optical frequency of (chirping) a laser light source to broaden the spectrum of the laser light output. The broader spectrum spreads the noise produced by an unchirped source over a broader band. A noise and distortion suppression system includes a chirp signal generator coupled to the signal path of an RF input signal carrying information to modulate the laser optical output. In some cases, the frequency of the chirp generating signal may result in second-order intermodulation products falling within the information band. In such cases, the RF input signal is predistorted to offset the expected distortion products.

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