Waveguiding devices, like modulators and switches, realized with InGaAsP lattice matched to InP are discussed. Basic phenomena, such as optical absorption, electro- and elasto-optic effect as well as the impact of free carriers on absorption and refractive index, are considered and described in their use with actually realized devices. Whereas the optical absorption seems not to be a main obstacle, the relatively large length of the devices will restrict their employment to the most essential functions.
"Monolithic IO-Technology - Modulators and Switches Based on InP", Proc. SPIE 0651, Integrated Optical Circuit Engineering III, (3 November 1986); doi: 10.1117/12.938130; https://doi.org/10.1117/12.938130