Optical Devices Or Arrangements For The Control Of Light By Modification Of The Optical Properties Of The Media Of The Elements Involved Therein; Non-linear Optics; Frequency-changing Of Light; Optical Logic Elements; Optical Analogue/digital Converters
H04W
Wireless Communication Networks
H01L
Semiconductor Devices; Electric Solid State Devices Not Otherwise Provided For
H04N
Pictorial Communication, E.g. Television
H04L
Transmission Of Digital Information, E.g. Telegraphic Communication