This WDM with LD filter is 3 ports passvie optical component based on TFF (Thin Film Filter) technology, which can combine 1310 laser diode signal and 1550 laser diode signal into single fiber.

Features
Low insertion loss
High isolation
Operating temperature -40 to 85 °C
Telcoredia GR-1209-CORE and GR-1221-CORE
PCT 168 hours reliability

Parameters	Unit	Limited Value
Pass  Insertion Ioss	dB	≤0.6
Reflect Insertion Loss	dB	≤0.4
PDL(Polarization Dependent Loss)	dB	≤0.1
Pass Isolation	dB	≥30
Reflect Isolation	dB	≥15
Return Loss	dB	≥45
Directivity	dB	≥55