iii. Infrared

Infrared offers a great unbound photonic solution. Like fiber optic cabling, infrared communication uses light, and not being bound by the limitations of electricity. The wavelengths of infrared radiation are shorter than those of radio waves and longer than those of light waves. They range between approximately 10-6 and 10-3 (about 0.0004 and 0.04 in). Infrared radiation may be detected as heat, and instruments such as bolometer are used to detect it.