{HEAD ~ A laser carrier} is passive aligned to an MT interface using alignments structures on {TAIL ~ a low cost replicated carrier} 
{ HEAD ~ A laser carrier } is passive aligned to an MT interface using alignments structures on { TAIL ~ a low cost replicated carrier }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL