GEZHI DWDM Red/Blue filter is a thin-film filter device. It is a three-port device. One port is called the "Common." The other two ports provide the conduit for the two wavelength "bands."
The two bands are the Red (λ>1547 nm) and the Blue (λ<1543 nm) .
One band goes thru the Reflected leg, and the other band goes thru the Pass leg.
Typically, however, the device is used as a two-way (i.e. bidirectional) WDM. One band is sent to the Common leg, while the other band is delivered from the Common leg. (see example diagram)In a DWDM module, which uses a Red/Blue filter, a Mux may be combined with a Demux.
For example, the Mux combines DWDM channels in the Red band, while the Demux separates DWDM channels in the Blue Band. Using a Red / Blue fillter, one can combine the Red Transmit channels and the Blue Receive channels onto a single fiber.
Example of a Red/Blue WDM in bi-directional usage.
Ø Low Insertion Loss Ø WDM Network
Ø Wide Pass Band Ø Line Monitoring
Ø High Channel Isolation Ø Telecommunication
Ø High Reliability Ø Testing Instruments
DWDM Red/Blue Band Filter DWDM Red/Blue Band Filter DWDM Red/Blue Band Filter with
with Stainless steel tube with Plastic ASB box Package 19" 1RU Rack mount package
Pass Channel Wavelength
Reflection channel Wavelength
Pass Channel insertion loss
Reflection Channel insertion loss
Adjacent channel isolation
Express channel isolation
Note: 1. Customization is available.
2. Insertion loss does not include connector, each connector will add 0.2dB loss.
3. Other wavelength can be made upon customer’s request. For example, L-Band R/B, C/L Band.
2= 90×20×10 mm
4= 120×80×18 mm