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 {HEAD ~ quantum} confined Stark effects 
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 { HEAD ~ quantum } confined Stark effects
OTH OTH OTH OTH 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 HEAD HEAD HEAD HEAD HEAD OTH OTH OTH