Signal transmission line for an optical modulator

Details Signal transmission line for an optical modulator Signal transmission line for an optical modulator

2005-03-29

2005-03-29

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

Reexamination Certificate

active

06873449

ABSTRACT:
An electro-absorptive-modulated laser (EAML) module includes a signal transmission line for transferring a high-frequency modulating signal from a signal source having an output impedance of 50 Ω to an EA modulator in the EAML module. The signal transmission line includes a coplanar waveguide with ground plane (CPWG) having a characteristic impedance of 41.8 Ω, a series resistor having a resistance of 5 Ω, and a termination resistor of 50 to 150 Ω. The characteristic impedance of CPWG is controlled by reducing the gap between the signal line and coplanar ground plates.

REFERENCES:
patent: 5602672 (1997-02-01), Ishimura et al.
patent: 5781578 (1998-07-01), Takagi
patent: 6057954 (2000-05-01), Parayanthal et al.
patent: 9-252164 (1997-09-01), None

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