Luna (General Photonics) CIR 3-Port Fiber Optic Circulator
Fiber-coupled 3-port optical circulator routing light from port 1 to 2 and port 2 to 3, in SM or PM versions at 1310, 1550 or 1064 nm.
- Center Wavelength
- 1310, 1550 nm; 1064 nm
- Bandwidth
- ±20 nm
- Bandwidth
- ±30 nm
- Bandwidth
- ±5 nm
Overview
The CIR is a 3-port fiber optic circulator from the passive component line originally developed by General Photonics and now part of Luna. It separates signals travelling in opposite directions along a fiber by transmitting light from port 1 to port 2 and from port 2 to port 3, while blocking signals travelling in the reverse directions.
The circulator is offered with single-mode or polarization-maintaining fiber at 1310 nm, 1550 nm or 1064 nm. The standard configuration for PM circulators is fast axis blocked; versions with both axes open may be available with a different package size and specifications.
In addition to the pigtailed CIR, the NCIR NoTail version has no external pigtails, which simplifies laboratory use and storage. NoTail 3- and 4-port components include mounting magnets for placement on an optical table. The 1064 nm SM version is not available in the NoTail configuration.
Typical uses include add/drop filters, EDFAs, dispersion compensation, fiber sensors and bi-directional communication. Luna lists this product as discontinued.
Key Features
- Compact
- Exceptional environmental stability
- Low excess loss
- NoTail model available
- Low insertion loss and high isolation
- Available with SM or PM fiber
- Pigtailed or NoTail versions available
Specifications
| Center Wavelength | 1310, 1550 nm; 1064 nm |
|---|---|
|
Bandwidth
SM
|
±20 nm
1310/1550 nm
|
|
Bandwidth
PM
|
±30 nm
1310/1550 nm
|
| Bandwidth |
±5 nm
1064 nm, SM and PM
|
|
Insertion Loss
SM
|
0.6 dB typical, 0.8 dB max.
1310/1550 nm. Without connectors; NoTail version can be 0.1 dB + connector loss higher
|
|
Insertion Loss
PM
|
0.9 dB max.
1310/1550 nm. Without connectors; NoTail version can be 0.1 dB + connector loss higher
|
|
Insertion Loss
SM
|
1.8 dB typical, 2.2 dB max.
1064 nm. Without connectors
|
|
Insertion Loss
PM
|
1.8 dB typical, 2.1 dB max.
1064 nm. Without connectors
|
| Return Loss |
50 dB
1310/1550 nm SM; 1064 nm SM and PM
|
|
Return Loss
PM
|
55 dB
1310/1550 nm
|
|
PDL at 23°C
SM
|
0.1 dB
1310/1550 nm; N/A for PM
|
|
PDL at 23°C
SM
|
0.2 dB
1064 nm; N/A for PM
|
|
PMD
SM
|
0.1 ps
N/A for PM
|
|
Extinction Ratio
PM
|
22 dB min.
1310/1550 nm; N/A for SM. Standard PM configuration is fast axis blocked
|
|
Extinction Ratio
PM
|
20 dB min.
1064 nm; N/A for SM
|
| Isolation (2→1 or 3→2, 23 °C) |
50 dB typical, 40 dB min.; 25 dB typical, 20 dB min.; 30 dB typical, 25 dB min
Values per wavelength/fiber column as printed in the datasheet table
|
| Cross Talk |
50 dB; 45 dB; 50 dB
Values per wavelength/fiber column as printed in the datasheet table
|
| Optical Power Handling | 300 mW |
| Operating Temperature |
0 to 50 °C
As printed in second column of datasheet table (1064 nm)
|
|---|---|
| Storage Temperature | -40 to 85 °C |
|
Dimensions (SM pigtailed, 1310 or 1550 nm)
CIR
|
Ø 5.5 x 50 mm |
|---|---|
|
Dimensions (SM 1064 nm)
CIR
|
34 x 8.4 x 8.4 mm (L x W x H) |
|
Dimensions (PM pigtailed)
CIR
|
Ø 5.5 x 35 mm |
|
Dimensions (NoTail)
NCIR
|
3.5" (L) x 1.5" (W) x 5/8" (H)
1064 nm SM version not available in NoTail configuration
|
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- Add/drop filters
- Digital, hybrid and AM-video systems
- Dispersion compensators
- Fiber sensors
- Bi-directional communication
- EDFAs
- Optical coherence tomography
Options & Accessories
| Option | Description |
|---|---|
| NCIR | NoTail 3-port fiber optic circulator — NoTail package without external pigtails; wavelengths 1310 nm or 1550 nm, FC/PC or FC/APC connectors |
| 10 | Wavelength 1064 nm — Pigtailed CIR only |
| 13 | Wavelength 1310 nm |
| 15 | Wavelength 1550 nm |
| SM | SM in/out |
| P1 | PM with both axes open — Pigtailed CIR only |
| P2 | PM with fast axis blocked |
| 25 | 250 µm pigtail — Connectors not recommended with bare fiber pigtails |
| 90 | 900 µm pigtail |
| FC/PC | FC/PC connector |
| FC/APC | FC/APC connector |
| SC/PC | SC/PC connector — Pigtailed CIR only |
| SC/APC | SC/APC connector — Pigtailed CIR only |
| NC | No connector — Pigtailed CIR only |