In optical communication network, signals travel through fibers for very large distances without significant attenuation. However, when the signals need to transmit several hundreds of kilometers, it becomes necessary to amplify the signals during transit. EDFA (erbium doped fiber amplifier), commercialized in the early 1990’s, became a key enabling technology for optical communication networks, and […]
WDM
How to Deal With Technical Issues of WDM-PON?
From time to time, the needs for more bandwidth in fiber access networks have never decreased. And these demands such as file-sharing, TV services and high-definition videos have just increased the desire for broadband access network based on fiber. People may ask what will be the next fiber access technology. There is one technology which […]
Two Types of WDM Connectivity – CWDM and DWDM
Intensive needs for great bandwidth availability and data transmission capacity have boosted the use of WDM in telecommunication. WDM (wavelength-division multiplexing) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e., colors) of laser light. There are two types of WDM : CWDM and DWDM. What’s the […]
Optical Multiplexing for High Speed Communication Systems
Introduction Optical transmission uses pulses of light to transmit information from one place to another through an optical fiber. The light is converted to electromagnetic carrier wave, which is modulated to carry information as the light propagates from one end to another. The development of optical fiber has revolutionized the telecommunications industry. Optical fiber has […]