Semiconductor optical modulator

Details Semiconductor optical modulator Semiconductor optical modulator

1994-09-28

1997-04-15

Epps, Georgia Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

G02F 103

Patent

active

056215649

ABSTRACT:
A semiconductor optical modulator includes an active region including a multi quantum well structure. Thereby, it is possible to absorb laser light having two polarization wave modes to a high degree as well as increase the number of quantum wells without fracturing the crystal, thereby providing a modulator having no polarization plane dependency and an increased extinction ratio. Further, a plurality of electrodes, each having an aperture, are provided at an upper surface and an electrode having the same number of apertures as on the upper surface is provided at a lower surface opposite the other electrodes. Multiple laser light beams incident from the apertures at the upper surface are respectively modulated and output from the apertures at the opposing lower surface. Therefore, in the active region, laser light beams including both TE and TM modes are absorbed or transmitted by the modulator without dependency on their respective polarization planes.

REFERENCES:
patent: 5315430 (1994-05-01), Brennan et al.
patent: 5373166 (1994-12-01), Buchan et al.

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