Sensors for photonic devices

This work analyses the current state of affairs related to built-in monitoring of laser radiation parameters. Attention is drawn to dearth of sensors that could measure spectral and temporal parameters of radiation at the sufficient level. A conclusion is drawn about importance of research and development and about the general progress in this field. New materials, novel technologies, and new ideas are able to facilitate development of new approaches to transformation of optical radiation parameters into electric signals and to extraction from those signals of higher-level information, to advance wireless operation and implementation of new integrated smart sensors, which are in great need.