ABSTRACT
Optimization of gamma characteristics of the photo-induced refractive-index increase (PRI) materials might contribute to reducing the optimum writing time difference and realizing the saturated coupling efficiency. For practical use of the Self-Organized Lightwave Network (SOLNET) optical solder, it is desirable that SOLNETs can be formed with fixed writing time regardless of the coupling conditions. One of the approaches to widen the writing time windows might be a slowdown in the SOLNET formation speed by reducing the write-beam intensity or the PRI material sensitivity. The gamma characteristics control for the PRI materials is expected to suppress the SOLNET degradation caused by the overexposure such as the broadening and the zigzag appearance, and contribute to widening the writing time windows. When usual photosensitive materials such as photopolymers, photodefinable materials, and photosensitive glass are used for the PRI materials, SOLNETs provide permanent lightwave paths. In order to produce dynamic SOLNETs, the chapter illustrates the reorganization of optical wiring.
