The 2000/1550nm Polarization Maintaining Filter WDM multiplexes PM signals and maintains the output polarization with high extinction ratio using advanced micro-optic filter technology. All input and output fibers are polarization maintaining. It utilizes advanced filter technology to yield wide-band, low insertion loss, high polarization extinction, high return loss in a compact package. This product can also be used to multiplex other wavelengths. It can also be provided with a PM isolator integrated in the same package. They are ideal for polarization maintaining fiber amplifiers, fiber lasers, and instrumentation applications.
| Features | Applications |
| · Low Insertion Loss
· High Extinction Ratio · High Isolation · High stability & Reliability |
· Fiber laser
· Fiber amplifier · Fiber Sensor · Monitoring in Coherent Systems |
Performance Specifications
| Parameter | Unit | Values | |
| Pass band Wavelength | nm | 1900~2050 | |
| Min. Isolation at 23℃ | dB | 25(Typ.30) | |
| Max. Insertion Loss at 23℃ | dB | 1.2 (Typ.0.8) | |
| Max. Extinction Ratio at 23℃ | dB | 20 | |
| Reflection band Wavelength | nm | 1520~1590 | |
| Max. Insertion Loss at 23℃ | dB | 1.0 | |
| Min. Isolation at 23℃ | dB | 12(Typ.15) | |
| Min. Extinction Ratio | dB | 20 | |
| Min. Return Loss | dB | 50 | |
| Max. Optical Power (CW) | W | 0.3, 0.7, 1, 2, 3, 5 | |
| Max. Peak Power for ns Pulse if any | kW | 1, 5, 10 | |
| Max. Thermal Stability | dB/℃ | 0.005 over -5 °C to +70 °C | |
| Fiber Type | Common & Pass Port | – | PM1950 fiber or other |
| Reflect Port | – | PM1550 fiber | |
| Operating Temperature | ℃ | -5~+70 | |
| Storage Temperature | ℃ | -40~+85 | |
| Package Dimensions | mm | Ø5.5 x L35(<5W), 60x12x8(>5W) | |
- Above specifications are for device without connector, all parameters are tested at room temperature.
- PM WDM device is both axis working, but we can integrate a polarizer to achieve the pass wavelength fast axis blocked, contact OPC PHOTONICS for details.
- For devices with connectors, IL will be 0.3dB higher, RL will be 5dB lower and ER will be 2dB lower. Power transmits through the connector less than 2W. The default connector key is aligned to slow axis.
- For >10W high power applications, we will use heat sink package, contact OPC PHOTONICS for details.
- If there is pulse application, please be sure to inform us of pulse energy and peak power.
Package Dimension
Order information P/N: PMFWDM-①-②-③-④-⑤-⑥
When you inquire, please provide the correct P/N number according to our ordering information, and attach the appropriate description would be better. If need any connector, we do not recommend choosing a 250μm bare fiber pigtail.
| ① | ② | ③ | ④ | ⑤ |
| Wavelength | Power Handling | Pigtails Diameter | Fiber Length | Connector |
| 2057: 2000nm pass/1570nm reflect | S:<0.3W
L:<0.7W 1:1W 2:2W |
25:250μm bare fiber
90:900μm Loose Tube XX: Others |
05:0.5m
08:0.8m 10:1.0m XX: Others |
00: None
FP: FC/PC FA: FC/APC XX: Others |
Part Number Example: PMFWDM-2055-S-25-10-00
Description: 2000/1550nm Polarization Maintaining Filter WDM – 0.3W,2000nm pass/1550nm reflect, PM1550 fiber on R, PM1950 fiber on C & P port, with bare fiber, 1.0 fiber length, and no connector at all ports.
Ordering Information for Custom Parts
If you need to customize other specifications, please provide detailed description for your requirement.
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