In order to provide a suitable resistivity, the OSCL 35 may be doped with {TAIL ~ sufficient conductive material} to have {HEAD ~ a moderate resistivity} 
In order to provide a suitable resistivity , the OSCL 35 may be doped with { TAIL ~ sufficient conductive material } to have { HEAD ~ a moderate resistivity }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD