Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-12-16
1999-06-29
Mullen, Thomas
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
372 26, 372 38, H04B 1004
Patent
active
059176377
ABSTRACT:
A device and a method for driving an electro-absorption optical modulator for receiving carrier light emitted from a light source and outputting signal light subjected to intensity modulation according to the absorption of the carrier light. A bias circuit generates a bias voltage determined so that the optical modulator has a given chirping parameter. A driving circuit generates a modulating signal corresponding to an input signal, superimposes the modulating signal on the bias voltage, and supplies the superimposed signal to the optical modulator. A control circuit controls at least one parameter selected from a parameter group including the amplitude and duty of the modulating signal and the power of the carrier light, based on the bias voltage. It can be possible to provide a method of and a device for driving an optical modulator capable of arbitrarily setting a chirping parameter.
REFERENCES:
patent: 4460249 (1984-07-01), Vincent
patent: 5550855 (1996-08-01), Aoyagi et al.
patent: 5706116 (1998-01-01), Sugata
patent: 5706117 (1998-01-01), Imai et al.
patent: 5732097 (1998-03-01), Yamaguchi et al.
Ishikawa George
Nishimoto Hiroshi
Fujitsu Limited
Mullen Thomas
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