Fiber grating is another great breakthrough in optical communications area following the progress of EDFA. Its appearance makes all complex optical networks possible.
光纤光栅作为光通信继掺铒光纤放大器之后的又一次突破，它的出现使许多复杂的全光网络通信成为了可能。
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WDM all opticalnetworks using wavelength routing represent the most promising solution for future high capacity fiber networks and how to manage it efficiently and flexibly is a hot spot.
The simulated results show that burst loss probability can be reduced by 1 to 2 orders of magnitude compared with the conventional schemes of fiber delay line in optical switching networks.