Chowunikira chakumbuyo chimapangidwa kuti chiwonetse kuwala kwakumbuyo kudzera mu cholumikizira kuchokera ku ulusi. Chingagwiritsidwe ntchito kupanga interferometer ya ulusi kapena kupanga laser ya ulusi yamphamvu yochepa. Zowunikira zakumbuyo izi ndi zabwino kwambiri poyesa molondola zomwe zimafotokozera za retroreflector za ma transmitter, ma amplifier, ndi zida zina.
Ma retroreflector a fiber optical amapezeka mu single-mode (SM), polarizing (PM), kapena multimode (MM). Filimu yasiliva yokhala ndi gawo loteteza kumapeto kwa fiber core imapereka kuwunikira kwapakati kwa ≥97.5% kuyambira 450 nm mpaka kutalika kwa ulusi. Mapeto ake ali mu nyumba yachitsulo chosapanga dzimbiri ya Ø9.8mm (0.39 in) yokhala ndi nambala ya gawo lolembedwapo. Mapeto ena a casing amalumikizidwa ndi cholumikizira chaching'ono cha 2.0 mm cha FC/PC(SM, PM, kapena mm fiber) kapena FC/APC(SM kapena PM). Pa fiber ya PM, kiyi yopapatiza imagwirizana ndi mzere wake wocheperako.
Chophimba chilichonse chimakhala ndi chipewa choteteza kuti fumbi kapena zinthu zina zodetsa zisamamatire kumapeto kwa pulagi. Zipewa zina zowonjezera za CAPF pulasitiki ndi zipewa za FC/PC ndi FC/APCCAPFM zachitsulo ziyenera kugulidwa padera.
Ma jumpers amatha kulumikizidwa ndi ma bushing ofanana, omwe amachepetsa kuwunikira kumbuyo ndikuwonetsetsa kuti malekezero olumikizidwa a ulusi akugwirizana bwino.
