FOCI's optical circulator is three port device, it is non-reciprocal device that redirect light from port-to-port sequentially in only one direction. For in-line type, it is with a wide range of connectors available to build on fiber cable end. 

Applications: 

• Optical amplifier 
• Optical transmitter 
• CATV 
• Testing instruments 
• Bi-directional transmission system 
• Dense WDM 
• Add/Drop Multiplexer (ADM) 
• Dispersion compensation

Features: 

• Extra high isolation 
• Low PDL 
• PMD free 
• Low cross-talk 
• Low insertion loss 
• Environmentally stable 
• Epoxy-free optical path