... grapes output,step-4dBm OEM LMS300 High stable optical light sourcesHandheld PON Stable source LMS-300P , provides 1310nm,1490nm, ... development , manufacturing . It is widely used in PON systems communication, optical measurementand fiber sensing, etc.FeaturesChinese and English menuHigh ... ~+70Dimensions(mm)168×103×45Weight (g)300 PON optical power meter 1550/1310/1490nm with stable laser source ...