Current injection modulator

Details Current injection modulator Current injection modulator

1990-07-03

1992-03-03

Moskowitz, Nelson

Optical: systems and elements

Optical modulator

Light wave temporal modulation

357315, 385 3, 385 14, G02F 103, G02F 1015, H01L 3302, G02B 514

Patent

active

050937464

ABSTRACT:
A current injection modulator includes structure defining a single crystal substrate, having some refractive index, on which are positioned, in succession, an inside reflector formed by a first set of epitaxial single crystal layers, a resonator layer and an outside reflector formed by a second set of epitaxial single crystal layers. At least a first part of the structure, including one or more of the inside reflector, substrate and resonator layer, is electrically conductive (either p-type or n-type conduction) and at least a second part of the structure, including the outside reflector and/or the resonator layer, is electrically conductive (either n-type or p-type conduction, but different from the first part). The structure further includes first and second electrical conductors in ohmic contact respectively with the first and second part of the structure, thereby to enable, by application of electrical potential to the electrical conductors, an electrical current to flow through the structure to cause it to vary the refractive index of the resonator layer pursurant to changes in the electrical current whereby to vary the light transmissivitiy of the modulator for modulating a light beam passing through the modulator in accordance with the changes in the electrical current.

REFERENCES:
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