The reverse bias across 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 {TAIL ~ Stark effects} 
confined
The reverse bias across 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 { TAIL ~ Stark effects }
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