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 {HEAD ~ a liquid crystal spatial light modulating element} used in the field of {TAIL ~ 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 { HEAD ~ a liquid crystal spatial light modulating element } used in the field of { TAIL ~ optical communications }
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