The present invention relates to {HEAD ~ an optical multi wavelength selective device}, more precisely a multi wavelength selective switch for rerouting and switching of wavelengths in {TAIL ~ an optical network}, in which each wavelength may be separately rerouted 
The present invention relates to { HEAD ~ an optical multi wavelength selective device } , more precisely a multi wavelength selective switch for rerouting and switching of wavelengths in { TAIL ~ an optical network } , in which each wavelength may be separately rerouted
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