2x2 1310 nm PM Filter Coupler, 50/50 Passive Devices They offer very low insertion

They offer very low insertion loss

It was designed to have a very low cutoff frequency of only 5 kHz

Wavelength Reference

SFG-785-20-M is a fully integrated Sum Frequency Generator module

Low Insertion Loss and High Isolation

2x2 1310 nm PM Filter Coupler, 50/50 Passive Devices They offer very low insertionThe coupler offers very low insertion loss, high return loss and high extinction ratio. It can be used for fiber sensor, fiber optical instrument, EDFA & raman amplifier. FEATURES Low Insertion LossHigh Return LossHigh Extinction Ratio USE IN EDFA & Raman AmplifierFiber SensorFiber Optical Instrument Lead Time: 3 4 WeeksDatasheet