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