Monolithic optical structures include a plurality of layer with each layer
having an isolated optical pathway confined within a portion of the layer. The
monolithic optical structure can be used as an optical fiber preform. Alternatively
or additionally, the monolithic optical structure can include integrated optical
circuits within one or more layers of the structure. Monolithic optical structures
can be formed by performing multiple passes of a substrate through a flowing particle
stream. The deposited particles form an optical material following consolidation.
Flexible optical fibers include a plurality of independent light channels extending
along the length of the optical fiber. The fibers can be pulled from an appropriate preform.