Optical communication systems’ transmission capacity continues to be increasing forever. From telegraph systems carrying a few clicks per second a hundred years ago, towards the state-of-the-art, long-distance, DWDM Network systems carrying over one Tbps today, the capacity of wired long-haul systems has burgeoned in an average annual increase of around one third (or perhaps a […]
optical amplifier
Video Multiplexer Using High Speed Amplifier
In the past few years, the number of video sources connected to a single display has increased steadily, make the video signal switching must in most video system. In a typicaly home entertainment systems, for example, a set-top box (STB) or digital video recorder (DVR) cable or statellite TV, VCR, DVD players, a video game console, and a […]
Development Of WDM Technology
In the early times, fiber optic signal transmission is one wavelength in one fiber glass. People finally found a way, which is known the widely used WDM(Wavelength Division Multiplexing) technology nowadays, to enable various kinds of fiber optic light to transmit in a single fiber glass in different wavelength. In early WDM systems, there were […]
Optical Active Devices Categories Introduction
In fiber optic networks, optical active devices are key components. It can convert electrical signals and optical signals to each other, the optical transmission system of the heart. Optical active devices are divided into the following three categories. A. Light Source The device that converts electrical signal into optical signal is called light source. The […]
Why we need a Fiber Optic Amplifier
The fiber optic amplifier plays a significant and key role within the enhancing the capacity for a communication system to deliver information. The light signals can be transmitted by the use of optical transmitters, optical receivers and optical fiber. The optical amplifier is a device amplifying an optical signal directly, without the need to first […]
Erbium-doped Fiber Amplifier
Optical amplifier is an optical communication system device. It amplifies an optical signal directly, without converting an optical signal into an electrical signal. Erbium-doped fiber amplifier (EDFA) is the first successful optical amplifier invented by the UK Southampton University and JP Tohoku University. It is one of the greatest invention in optical communication. Erbium-doped optical […]