... ( Single - Mode : PC ≤ 0.2 db ,APC ≤ 0.3 db , Multi - Mode : PC ≤ 0.3 db ) . 2 . Return Loss ( Single - Mode : PC ≥ 50 ... db , APC ≥ 50 db , Multi - Mode : PC ≥ 45)3.Working Temperature:-40 °C ~+75°C4.Operating Wavelength:1310 ... .Type: Single - Mode ( 9/125 um ) , Multi - Mode ( 50/125 um , 62.5 / 125 um , )3.Specification: single core , dual - core , the ...