ROF -BPR fa'asologa o le malamalama paleni module (paleni photodetector) tu'ufa'atasia le lua fa'atusa photodiode ma se ultra-maualalo leo transimpedance fa'atele, fa'aitiitia lelei le leisa leisa ma masani masani leo, fa'aleleia le fua faatatau o le pisapisao o le faiga, i ai le tele o tali spectral filifiliga, Le pisapisao maualalo, maua maualuga, faigofie ona faʻaoga ma isi, Faʻaaogaina tele mo spectroscopy, suʻesuʻega heterodyne, fua faʻatuai opitika, tomography coherence mataʻituina ma isi fanua.