Variable optical attenuator on an electro-optical layer

Optical waveguides – Accessories – Attenuator

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C385S002000, C385S014000, C385S131000

Reexamination Certificate

active

06917748

ABSTRACT:
The intensity of signals in optical networks can be controlled using a variable optical attenuator (VOA). The present invention is a VOA that is particularly well suited for optical networks, for example to provide channel-by-channel normalization of gain control of wavelength division multiplexed signals. The inventive VOA includes a waveguide having an electro-optical material and electrodes that produce an electric field within the electro-optical material when a voltage difference is applied to the electrodes. The electro-optical material can either be a substrate or can be a layer deposited on a substrate. In an alternative embodiment, a polarization independent VOA is formed from a waveguide that includes two, end-to-end waveguides. In one embodiment, a 90 degree polarization rotator is provided between the two waveguides. In another embodiment, each of the two waveguides has a different electro-optical material selected to selectively pass one of two 90 degree polarizations.

REFERENCES:
patent: 6441955 (2002-08-01), Takatsu et al.
patent: 6546163 (2003-04-01), Thackara
patent: 6553175 (2003-04-01), Jaspan

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Variable optical attenuator on an electro-optical layer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable optical attenuator on an electro-optical layer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable optical attenuator on an electro-optical layer will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3421365

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.