Electric field absorption light modulation driving apparatus and

Details Electric field absorption light modulation driving apparatus and Electric field absorption light modulation driving apparatus and

1992-10-29

1994-05-31

Bovernick, Rodney B.

Coherent light generators

Particular component circuitry

Optical pumping

372 33, 359180, 359181, 359276, 359320, 455106, H01S 310, H04B 1004, G02F 101, G02F 129, G02F 129

Patent

active

053175816

ABSTRACT:
An electric field absorption light modulation unit includes a light emission device for emitting light and a modulation device for varying a light transmittance thereof of light applied by the light emission device so as to provide the light as a result of modifying thereof. A driving signal generating unit coupled with the electric field absorption light modulation unit generates a driving signal to be applied to the modulation device from an input information signal by making the modulation device vary the light transmittance thereof, and the driving signal generating unit provides the driving signal so that the driving signal in a fluctuation range in which an undesirable level fluctuation may be present, corresponds to a constant working range of the modulation device, the light transmittance thereof staying at a constant value in the constant working range.

REFERENCES:
patent: 5208817 (1993-05-01), Kao et al.
Noda et al., "High-Speed Electroabsorption Modulator with Strip-Loaded GaInAsP Planar Waveguide", Journal of Lightwave Technology, Oct. 1986, vol. 4, No. 10, pp. 1445-1453.
Tanaka et al., "5-Gb/s Performance of Integrated Light Source Consisting of .lambda./4-Shifted DFB Laser and EA Modulator with SI InP Structure", Journal of Lightwave Technology, Sep. 1990, vol. 8, No. 9, pp. 1357-1362.
Mitomi et al., "Chirping Characteristic and Frequency Response of MQW Optical Intensity Modulator", Journal of Lightwave Technology, Jan. 1992, vol. 10, No. 1, pp. 71-77.

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