A coupler assembly for a fiber laser is disclosed. When the data stream is received, at least a portion of the data stream is parsed into a plurality of data blocks and a plurality of sets of validation bytes, wherein each of the plurality of data blocks corresponds to one of the plurality of sets of validation bytes. The \u201cmaster\u201d display head receives pixels from the \u201cslave\u201d display head in addition to its own pixels, and pixel selection logic in the master display head can blend the two pixels or select either one to the exclusion of the other. The capacitor and the inductor constitute a series resonant circuit, by which a trap filter for signals passing through an isolator as the nonreciprocal circuit device is constituted. The carbon nanotube pipe includes a first end, a second end and a main body connecting the first end and the second end.