Hi, We are seeing all-optical wavelength routing WDM network come to be mature especially after some vendor started to sell their commercial systems. All-optical packet switching network is still in its infancy although some projects (e.g., KEOPS in Europe) have successfully set up their laboratory systems. Do you think this kind of all-optical packet switching network will come to be mature soon and then combined with WDM system to dominate the high-speed transport network in the next century? Currently, there are several other kinds of transmission technologies such as OTDM, OCDMA, which are all the competitors. To be honest, I am inclined to all-optical packet switching network. However, there is a very fatal limited factor on it, which is the fiber delay lines. The use of fiber delay lines can make the system quite big and complicated. In addition, the feature FIFO of fiber delay lines is another drawback. How do you think of it? have a nice day, gangxiang shen
