Optoelectronics is the electronic technology associated with the use of, detection of, or abscense of light.

Optoelectronics is the study of electronic devices that detect and control light, generally on a sub atomic level with photons. Optoelectronics is also concerned with invisible forms of radiation such as Gamma rays, X rays, ultraviolet and infrared radiation - all of which fall under the broad spectrum of light.

W.H Sahm has written:

'Optoelectronics'

look into wikipedia's definition of both

John Gowar has written:

'Optical Communication Systems (Optoelectronics)'