Infrared Emitting Diodes (IREDs) are semiconductor devices that convert electrical energy into light, specifically in the infrared spectrum. IREDs are typically used in optical communication applications, such as in fiber optic cables. When an electrical current passes through an IRED, it emits light in the infrared range, which is invisible to the human eye. This light can then be transmitted via optical fibers, which are thin strands of glass that have been coated with a protective material.
When infrared light is sent down an optical fiber, it is used to transmit data from one point to another. As this light passes through the fiber, it is converted to an electrical signal and sent to its intended destination. Furthermore, IREDs are used in fiber optic cables to provide a secure connection for data transmission. Since infrared light is invisible to the human eye, it is more difficult for unauthorized individuals to intercept the signal, thus making it more secure.
IREDs are also used in medical applications, such as in infrared thermometers and imaging systems. In these applications, the IREDs are used to detect the temperature of an object or the presence of a certain material. Additionally, IREDs can be used in television remote controls, as the infrared light emitted from the remote is detected by the television, allowing the user to control the device from a distance.
Overall, IREDs are an essential component in modern communication systems and are used for both data transmission and medical applications. They are found in fiber optic cables, television remote controls, infrared thermometers, and imaging systems.