{HEAD ~ The reverse bias} across {TAIL ~ the photodiodes} may be varied and this is of particular use for detectors whose spectral response may be shifted by means of, for instance the Franz Keldysh or quantum confined Stark effects 
across
{ HEAD ~ The reverse bias } across { TAIL ~ the photodiodes } may be varied and this is of particular use for detectors whose spectral response may be shifted by means of , for instance the Franz Keldysh or quantum confined Stark effects
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH