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Four-port optical circulator is a special type of circulator that has one input (port 1), one output (port 4) and two common ports (port 2&3). The light goes through port 1 to port 2. At port 2, any incoming light is guided to port 3 as output, while all input from port 3 is guided to port 4 as output.
Compared to three-port circulator, four port device has one additional bi-directional port. Hence, it can be used to construct more flexible or more complex optical fiber sub-systems, such as add/drop module, mux/demux module, multi-port bi-directional splitters, WDM optical router, etc.Features:
- Four-port operation
- Wide band (+/-30nm at 1310nm or 1550nm)
- High isolation
- Low PDL
- Epoxy free optical path
Applications:
- Add/drop WDM systems
- Bi-directional communication systems
- Optical dispersion compensation systems
Specifications:
Ordering Information:
CIR-4-a-c-d
a: Center Wavelength, a=1310 for 1310nm, a=1550 for 1550nm, etc.
c: Pigtail Type, c=0 for 250 micron bare fiber pigtail, c=1 for 900 micron loose tube pigtail, etc.
d: Connector Type, d=FA for FC/APC, d=SU for SC/UPC, d=N for no connectors, etc.Example: CIR-4-1550-1-FA
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