Source google image: https://ae01.alicdn.com/kf/HTB1xlxZLpXXXXaEXFXXq6xXFXXXA/High-isolation-3-Ports-3-0mm-1M-FC-UPC-T1550-R1310-1490-FWDM-Filter-Wavelength.jpg_640x640.jpg
Isolation f.c
Source google image: https://ae01.alicdn.com/kf/HTB1xlxZLpXXXXaEXFXXq6xXFXXXA/High-isolation-3-Ports-3-0mm-1M-FC-UPC-T1550-R1310-1490-FWDM-Filter-Wavelength.jpg_640x640.jpg