29 Nov types of laser in optical communication
Laser is an optical device that generates intense beam of coherent monochromatic light by stimulated emission of radiation.. Laser light is different from an ordinary light. Fiber optics, first made practical by British physicist Harold Hopkins in 1952, gradually overtook electronic cable as the technology was improved by more precisely tunable lasers and higher-quality fiber.Today, it is the go-to tech for communications -- at least until FSO communication becomes more efficient and effective. In outer space, the communication range of free-space optical communication is currently of the order of several thousand kilometers, suitable for inter-satellite service.It has the potential to bridge interplanetary distances of millions of kilometers, using optical telescopes as beam expanders. Optical fiber communication 7. LASER Applications of Lasers. They are employed as high speed transmitter in digital and analog fiber optic networks, to pump lasers in Erbium doped amplifiers (EDFAs), or as high-power pulsed lasers in test and measurement field. It has various unique properties such as coherence, monochromacity, directionality, and high intensity. A laser of lower mean power can be used which emits pulses of high peak power with a low duty cycle. There are three basic phases to optical communications: Acquisition: The beam must be as wide as possible in order to reduce the acquisition time. Laser communication in space is free-space optical communication in outer space.. LASER • A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. Lasers are able to see through the dense foliage, and they can allow for space communication from distances measured in millions of miles, We use lasers everywhere such as in the military systems, the avionics and in submarines.. Laser communications are better than radio as light wavelengths are packed much more tightly than the sound waves and they transmit more information … Optical fiber is the most common type of channel for optical communications. • LASER stands for "light amplification by stimulated emission of radiation”. But this requires a high-power laser transmitter. The transmitters in optical fiber links are generally light-emitting diodes (LEDs) or laser diodes. Laser communication between satellites and also between any transmission satellite and a ground station in the range of multiples (preferably hundreds) of Gbit/s is needed in order to establish global Internet connectivity. Optical communication has been one of the driving forces in developing laser diode technology. Today, diode lasers are the key components of any broadband communication systems.
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