Polarization Maintaining Filter Wavelength Division Multiplexer (PM Filter WDM) is best for high speed WDM network systems. It maintains signal polarization while providing wavelength division multiplexing. It is totally dependent on environmentally stable thin films filter technology with high return loss.
What is the need for Wavelength Division Multiplexing?
It can be said as the technology which is multiplexing various optical signals onto a single fiber. It is incorporated using different wavelengths of laser light enabling bi-directional communications over fiber connections. It is different from frequency division multiplexing which is applied to a radio carrier. As the name suggest, multiplexer transmit several signals together. It is popular among telecommunication industry because without laying more optical fiber companies can expand the capacity of the network.
Why to use PM Filter WDM?
- It can be used best to maintain polarized fiber amplifiers and is used in DWDM systems.
- With help of this WDM, high speed communication systems are developed.
- It also helps in the development of instrumental applications.
Features of PM Filter WDM
Listed below are some of the PM Filter WDM features –
- It has high extinction ratio.
- High return ratio.
- Great reliability and strong environmental stability.
- Low insertion loss.
PM Filter WDM is used for applications like EDFAs, fiber sensing system, WDI module and many more. Compliance is maintained in terms with RoHS and Telcordia GR-1221-CORE. While designing and manufacturing ITU standards should be followed. PM Filter WDM is used by companies and individuals to perform drop function or adding a single channel. It is used on sensor systems with advanced packaging technology.
Performance Specification of PM Filter WDM
Here are detailed specifications of the WDM –
| Parameter | Unit | T1550/R980 | T980/R1550 | |
| Transmission Wavelength Range | nm | 1520~1580 | 960~990 | |
| Reflect Wavelength Range | nm | 960~990 | 1520~1580 | |
| Max. Insertion Loss | Transmission | dB | 0.8 | |
| Reflect | dB | 0.5 | ||
| Min. Isolation | Transmission | dB | 25 | |
| Reflect | dB | 12 | ||
| Min. Extinction Ratio | dB | 20 | ||
| Min. Channel Flatness | dB | 0.3 | ||
| Min. Return Loss | dB | 50 | ||
| Max. Power Handling(CW) | W | 0.3, 0.7, 1, 2, 3, 10 | ||
| Max. Tensile Load(N) | N | ≤5 | ||
| Fiber Type | – | PM Panda fiber | ||
| Operating Temperature | ℃ | -5 to +70 | ||
| Storage Temperature | ℃ | -40 to +85 | ||
| Package Dimensions | mm | Ø5.5 x L35 | ||
Specifications can be changed or altered as required. Also, the values specified are not subjected to any connector loss. PM fiber and the connector key are aligned to slow axis. This product can also be used to multiplex other wavelengths, including 980/1064 PM WDM nm (pulsed laser applications) and 1064/1550 nm (Erbium-Ytterbium pumping). Low power (300 mW, 500 mW) and high power (5W) handling are available.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 high speed communication system and instrumentation applications.