Abstract
The present invention is an optical signal interlace de-multiplexer which can cross-separate the optical signal of all wavelengths into two optical signals with larger spacing, i.e. use a birefringence waveplate to form the optical signal cross interlace mechanism which can separate the optical signal of all wavelengths into e-RAY signal and o-ray signal, so as to increase the total transmission capacity under the current network physical structure.