1x4 1310 nm & 1550 nm Tap Coupler Module, Tap Ratio: N/A, Coupler Ratio: 50/50 Single Mode Fiber Optic Circulator It has a heat sink

It has a heat sink package and a hole for temperature monitoring

coupler ratio: 65/35

EDFA & Raman Amplifier

2%/98% coupler

The coupler is a 1x2 1550 nm 01/99 single window coupler

1x4 1310 nm & 1550 nm Tap Coupler Module, Tap Ratio: N/A, Coupler Ratio: 50/50 Single Mode Fiber Optic Circulator It has a heat sinkThe module is a 1x4 1310 nm & 1550 nm tap coupler module, tap ratio: N A, coupler ratio: 50 50. This highly reliable coupler module offers very low insertion loss, low polarization dependence and excellent environmental stability. It can be used for optical communication, HFC & fiber sensors, fiber laser, optical amplifier and photonics integration. FEATURES Low Excess Loss Low Insertion Loss Low PDL High Stability and Reliability USE IN Optical