Selection guide
PM WDM vs Filter WDM
Compare PM fused WDM and filter-based WDM for wavelength routing, PM performance, package and power requirements.
Use this page when
you know the wavelength pair but are unsure whether a fused PM WDM or filter-based WDM is the better starting point.
Quick comparison
| Selection point | PM Fused WDM | PM Filter WDM |
|---|---|---|
| Construction direction | Fused WDM | Filter-based WDM |
| Typical standard power | 3 W for standard PM Fused WDM | 500 mW for standard PM Filter WDM |
| High-power option | 20 W High Power PM Fused WDM | 20 W High Power WDM / Filter |
| Selection emphasis | Wavelength pair + ER + isolation + fused package | Pass/reflect bands + isolation profile + power |
| Best use of page | PM amplifier / sensing / coherent systems | Filter-based wavelength routing and modules |
RFQ rule: The fastest inquiry includes the application plus wavelength, power, fiber, connector and quantity. If one parameter is unknown, send the known conditions for engineering review.
Which one should you choose?
Choose PM Fused WDM when...
Choose PM fused WDM when fused construction, PM extinction ratio and the listed wavelength pairs match the optical path.
Choose PM Filter WDM when...
Choose filter WDM when pass/reflect bands and isolation profile are the primary wavelength-routing requirements.
Recommended starting points
Common questions
Is one construction always better?
No. The choice depends on wavelength pair, isolation, extinction ratio, power and package requirements.
Can I select only by wavelength pair?
No. Power, fiber type and required isolation should be confirmed before RFQ.
Still not sure which configuration fits?
Start engineering RFQSend the application and known parameters. Engineering can confirm the remaining specification.