Quiz 25: Optical Communication Systems

Trade & Technology

The optical fibers are used to transmit the signals from transmitter to receiver in optical communication systems and it can be either single mode fibers or multimode fibers and can be used depending up on the distance over to travel the signals. Commonly for short range distances such as within the factories and offices, multimode optical fibers are used, which can allow electronic devices operated at lower wavelengths such as light-emitting diode (LED) used as a transmitter and PIN diode used as a receiver, because of which they operate at lower wavelengths of 850 nm and also which have low cost. But in case of single mode fibers, which operate at higher wavelengths as compared to multimode fibers for transmission.

Optical fibers are used to transmit the signals from transmitter to receiver in optical communication systems and it can be either single mode fibers or multimode fibers depending up on the distance over to travel the signals. Commonly for long range distance communications such as for telephone trunk lines, single mode optical fibers, which are operated at higher wavelengths such as Laser diodes used as a transmitter and an Avalanche photodiode (APD) used as a receiver, because of their operation at higher wavelengths either at img or img . Early single mode fibers operated at a wavelength of img with a less loss in signaling, but current single mode fibers are operating at a wavelength of img with zero dispersion. For high speed systems the common data rate is 10 Gb/s and even higher data rates are possible in newest undersea telephone cables.

Commonly for short range distances such as within the factories and offices, multimode optical fibers are used, which can allow low cost electronic devices operated at lower wavelengths such as at 850 nm. For long range distances communication such as for telephone trunk lines, single mode optical fibers are commonly used, which are operated at higher wavelengths either at img or img . Early single mode fibers operated at a wavelength of img with a less loss in signaling, but current single mode fibers are operating at a wavelength of img with zero dispersion.

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