Integrated optical signal processing devices can be implemented through the use of passive structures. A wide variety of devices and functions can be developed from a few fundamental elements. Possible device designs and applications are discussed.
B. M. Nyman,
Paul R. Prucnal,
"Passive Waveguide Structures For Integrated Optical Signal Processing," Optical Engineering 28(9), 289982 (1 September 1989). https://doi.org/10.1117/12.7977074