Description
1120nm Faraday PM 3-port Optical Circulator
1120nm Faraday PM 3-port Optical Circulator is a fiber passive component built with faraday crystal, which can change signal light transmission path, the signal can be delivered from Port 1 to Port 2, the other signal light from Port 2 to Port 3, the high isolation can block the back reflection light. It’s widely used in Laser System, Fiber Optic Sensor and Coherent Detecting field.
| Application: | Features: | ![]() |
| Fiber Optic Sensor | High Extinction Ratio | |
| Fiber Laser | High Isolation | |
| Coherent Detecting | Low Insertion Loss | |
| Lab & Research | High Reliability |
Specification:
| Parameter | Symbol | Value | Unit |
| Center Wavelength | λ | 1120 | nm |
| Bandwidth | BW | ±5 | nm |
| Typ. Insertion Loss | IL | 2.5 | dB |
| Max. Insertion Loss | IL | 3.2 | dB |
| Typ. Peak Isolation | ISO | 23 | dB |
| Min. Isolation | ISO | 16 | dB |
| Min. Extinction Ratio | ER | 20 | dB |
| Min. Cross Talk |
Ct | 50 | dB |
| Min. Return Loss | RL | 50 | dB |
| Max. Optical Power (CW) | P | 300 or customized | mW |
| Max. Tensil Load | 5 | N | |
| Fiber Type | PM Panda fiber | – | |
| Operating Temperature | T | -5~50 | ℃ |
| Storage Temperature | T | -40~85 | ℃ |
| Package Dimension | L34xW8.4xH8.4 | mm |
| Notice: Above specifications are tested at center wavelength without connector in room temperature @23℃. |
| For devices with connectors, IL will be 0.3dB higher, ER will be 2dB lower, RL will be 5dB lower. |
Drawing:

Ordering Information (Part Number):
| PMFCIR-WWWW-P-A-J-LL-CC |
|||||
| WWWW | P | A | J | LL | CC |
| Wavelength | Port | Working Axis | Fiber Jacket | Fiber Length | Connector |
| 1120 – 1120nm | 3 – 3 Ports | F – Fast Axis Blocked | B – 250um Bare Fiber | 05 – 0.5m | NE – None |
| SSSS – Specify | Slow Axis Working | 9 – 900um Loose Tube | 10 – 1.0m | FA – FC/APC | |
| B – Both Axes Working | 2 – 2.0mm Loose Tube | 15 – 1.5m | FU – FC/UPC | ||
| 3 – 3.0mm Loose Tube | 20 – 2.0m | SS – Specify | |||
| SS – Specify | |||||
Example: PMFCIR-1120-3-B-9-10-FA is the PN for 1120nm Faraday PM 3-port Optical Circulator, Both Axes Working, 300mW, 1.0m PM Panda fiber, 900um loose tube, FC/APC connector

