Hello, everyone!
In this post, I would like to share with you the light wavelength used in modern laser communication.
Optical fiber transmission uses wavelengths that are in the near-infrared portion of the spectrum, just above the visible, and thus undetectable to the unaided eye. Typical optical transmission wavelengths are 850 nm, 1310 nm, and 1550 nm. Both lasers and LEDs are used to transmit light through an optical fiber. Lasers are usually used for 1310- or 1550-nm single-mode applications. LEDs are used for 850- or 1300-nm multimode applications. There are ranges of wavelengths at which the fiber operates best. Each range is known as an operating window. Each window is centered on the typical operational wavelength, as shown in this table.
These wavelengths were chosen because they best match the transmission properties of available light sources with the transmission qualities of optical fiber.
For more communication, it's normally used 1310nm window and 1550 nm window. Especially for long-distance service transmission, 1550nm windows are the majorly commonly used.
Thank you!
