The present invention relates to an optical node device that includes, for example, a wavelength selective optical switching device, a wavelength blocker device, and the like, used in {TAIL ~ a liquid crystal spatial light modulating element} used in {HEAD ~ the field} of optical communications 
The present invention relates to an optical node device that includes , for example , a wavelength selective optical switching device , a wavelength blocker device , and the like , used in { TAIL ~ a liquid crystal spatial light modulating element } used in { HEAD ~ the field } of optical communications
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