PON Optical popwer metrer/Stable Laser soures Wavelength :1310,1550 1490 0dBm output, four grapes output,step-4dBm OEM LMS300 High stable optical ... 300P , provides 1310nm,1490nm,1550nm wavelength laser output ,650nm visible laser source output optional. Using Advanced laser control technology for engineer, research and ... 45Weight (g)300 PON optical power meter 1550/1310/1490nm with stable laser source