First - Third Generation

 Here are some historical stage of development of fiber optics technology: 
• First Generation (1970) 
- The system is simple and became the basis for the next generation system consists of:       ***Encoding: Change the input (eg voice) into electrical signals. 
***Transmitter: Changing electrical signals into light waves modulasi, in the form of LED with the wavelength 0.87 μm. 
***Silica Fiber: As the introduction to light waves. 
***Repeater: In light of the wave is weak on the road 
***Receiver: Change modulasi light waves into electrical signals, a photo-detector 
***decoding: Changing the signal into electrical ouput (eg voice) 
- Repeater work with the light waves into electrical signals and then strengthened in electronic and changed back into light waves.
 In 1978 transmission capacity can reach 10 Gb.km / s. 

• Second Generation (from 1981) 
- To reduce the effects dispersi, the size of the core fiber zooms. 
- Index of bias, leather-made sedekat proximity with the core index of refraction. 
- Using a diode laser, long waves that emanated 1.3 μm. 
- Transmission capacity to 100 Gb.km / s. 

•  Third Generation (1982 start) 
- The creation of silica fiber. 
- Creation chip diode laser berpanjang wave 1.55 μm. 
 Purity-silica material can be improved so that  transparent made for the long waves around 1.2 μm to 1.6 μm 
- Capacity transmitting a few hundred Gb.km / s.