Driving apparatus for optical modulator and driving apparatus fo

Details Driving apparatus for optical modulator and driving apparatus fo Driving apparatus for optical modulator and driving apparatus fo

1998-04-16

1999-12-14

Sugarman, Scott J.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359173, 359181, B02F 1015

Patent

active

060025107

ABSTRACT:
A driving apparatus for causing an optical modulator to output modulated light, which has a PIN structure composed of a buffer layer, a light absorption layer and a clad layer and wherein an absorbed amount of light waves inputted to the light absorption layer varies in response to an applied voltage applied in the reverse direction to the PIN structure, includes a voltage waveform converter for deforming an input signal waveform so as to correct the non-linear characteristics of the absorbed amount with respect to the applied voltage of the optical modulator or a level shifting circuit for shifting a voltage level of the input signal to a forward voltage side to the PIN structure within a built-in voltage to correct the displacement of a cross point of an eye pattern of modulated output light outputted from the optical modulator of the electrical field absorption type.

REFERENCES:
patent: 5546218 (1996-08-01), Komatsubara et al.
patent: 5706116 (1998-01-01), Sugata
patent: 5706117 (1998-01-01), Imai et al.
By Morito et al., Collection of Lecture Papers of the Meeting in 1995 of the "Electronics Society of the Electronic Information Communication Society of Japan", Separate vol. 1, p. 30l (Lecture Number: C-301.

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