| SIC Codes: | 3674 |
| NAICS Codes: | 334413 |
Companies in this industry design and manufacture optical components and subsystems for telecommunications equipment. Products include attenuators, depolarizers, deserializers, dispersion processors, micro-electro-mechanical systems (MEMS), multiplexers, optical amplifiers, signal splitters, and tunable lasers. The industry does not include companies that primarily make fiber optic cable or semiconductors.