Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1994-08-02
1995-09-26
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359161, 359188, 372 32, H04B 1012
Patent
active
054538688
ABSTRACT:
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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Blauvelt Henry A.
Frame John S.
Huff David B.
Yariv Amnon
Ortel Corporation
Pascal Leslie
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