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AssigneeLucent Technologies Inc.
InventorsAref Chowdhury, Douglas M. Gill, Mark Lee
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The present invention is an improved electro-optical device comprising a substrate-supported layer of electro-optical material disposed between upper and lower electrodes. Conventional practice has been to make the electrodes thick to minimize electrical loss. Applicants, in contrast, have discovered that the performance of the device can be improved by making the electrodes thin—typically about 2 microns or less and preferably about 0.5 micron or less. While the thin electrodes take a relatively large loss penalty at low frequencies, at higher frequencies the thin electrodes provide a relatively low loss, thus producing a flattened frequency response as compared with thick electrode devices. The device can maintain a wide operating bandwidth at frequencies of interest for optical transmission while reducing the required drive voltage.
An electro-optic phase shifting device for changing the phase of light traveling therethrough in response to a modulating voltage signal, the device having an electrical bandwidth response comprising a 3 dB frequency f greater than about 7 GHz at which the phase shift response to the modulating voltage is reduced by 3 dB, the device comprising:
An electro-optic phase shifting device for changing the phase of light traveling therethrough in response to a modulating voltage signal, the device having an electrical bandwidth response comprising a 3 dB frequency f greater than about 7 GHz at which the phase shift response is reduced by 3 dB, the device comprising:
An electro-optic phase shifting device for changing the phase of light traveling therethrough in response to a modulating voltage signal, the device having an electrical bandwidth response comprising a 3 dB frequency f greater than about 7 GHz at which the phase shift response to the modulating voltage is reduced by 3 dB, the device comprising:
Dependencies are inferred from the claim text.