In {TAIL ~ one aspect}, the present invention provides {HEAD ~ an optical node device} that uses a spatial light modulating element that is able to reduce flicker and achieves a light node device that is small and consumes little power, because it does not use thermal electric cooling elements 
In { TAIL ~ one aspect } , the present invention provides { HEAD ~ an optical node device } that uses a spatial light modulating element that is able to reduce flicker and achieves a light node device that is small and consumes little power , because it does not use thermal electric cooling elements
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