

1×2 Polarization-Maintaining Fiber Optic Coupler PMC-405-25-FU
PMC-405-25-FUDesign Tools
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The LBTEK polarization-maintaining fiber coupler is manufactured using panda-type polarization-maintaining fiber, which can maintain a high polarization extinction ratio when light is coupled along the slow axis of the fiber. It is suitable for various polarization-maintaining optical systems to distribute input light in a 25:75 ratio to the two output ends. The coupler features uniform beam splitting, low additional loss, as well as high return loss and operational stability. Each LBTEK polarization-maintaining coupler undergoes rigorous testing before leaving the factory and comes with a test datasheet for customer reference.
- Multiple Wavelengths Available within the Range of 405-2000 nm.
- Split Ratio 25:75
- FC/APC or FC/UPC Connector
- Single-Ended Fiber 1 Meter

| Operating Wavelength | 405±10 nm |
| Splitting ratio | 25:75 |
| Extinction ratio | ≥ 16 dB |
| Connector Type | FC/UPC |
| Operating Temperature | -40 ~ +85 °C |
| Fiber Type | PM-S405-XP 900 µm Loose Hytrel® Tube |
| Fiber length | 1 m |
| Storage Temperature | -40 ~ +85 °C |
| Power Handling | 100 mW (50 mW with connector) |
| Maximum Pulling Force | 5 N |
| Insertion Loss | ≤ 3.6 dB (Port 1) ≤ 7.8 dB (Port 2) |
| Return Loss | ≥ 50 dB |
| Port Configuration | 1×2 |
| Package Dimensions | φ3.0×L54 mm |






