Drive circuit of a simiconductor optical modulator

Details Drive circuit of a simiconductor optical modulator Drive circuit of a simiconductor optical modulator

1995-03-16

1996-08-13

Hellner, Mark

Optical: systems and elements

Optical modulator

359248, G02B 2600

Patent

active

055462189

ABSTRACT:
A circuit for driving a semiconductor optical modulator which has a first semiconductor layer having a first conduction type, a second semiconductor layer having a second conduction type, and a modulation active layer sandwiched with the first and second semiconductor layers, wherein the semiconductor optical modulator modulates light emission from a semiconductor laser diode having at least a third semiconductor layer having the first conductivity type, the third semiconductor layer which is electrically connected to the first semiconductor layer of the semiconductor optical modulator, the driving circuit is provided with an output circuit for outputting a drive signal to the semiconductor optical modulator based on a signal for optical modulation inputted from the outside, and a compensation circuit for regulating a resistance of bypass channel of current passing in the semiconductor optical modulator by a drive signal of the output circuit based on the signal for optical modulation and compensating a voltage level of the drive signal to be constant.

REFERENCES:
patent: 5394260 (1995-02-01), Suzuki et al.
"Monolithic Integration of InGaAsP/InP Distributed Feedback Laser and Electro-absorption Modulator by Vapor Phase Epitaxy", Suzuki et al, Journal of Lightwave Technology, vol. LT-5, No. 9, Sep. 1987, pp. 1277-1285.
"Electrical and Optical Interactions Between Integrated InGaAsP/InP DFB Lasers and Electroabsorption Modulators", Suzuki et al, Journal of Lightwave Technology, vol. 6, No. 6, Jun. 1988, pp. 779-785.
"Monolithic Electro-absorption Modulator/DFB Laser Light Source", Soda et al, OQE89-30, pp. 31-36.

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