IR light from the laser is directed to {HEAD ~ the spring region} of {TAIL ~ the suspension} by optical fibers 
of
IR light from the laser is directed to { HEAD ~ the spring region } of { TAIL ~ the suspension } by optical fibers
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH