PM CWDM
Polarization-maintaining coarse wavelength division multiplexer (PM CWDM) based on thin-film filter technology, featuring 20 nm channel spacing, low insertion loss (0.6 dB max), and high channel isolation (≥30 dB).
Technical Specifications
Parameter
Specification
Unit
Center Wavelength
ITU or ITU + 1
nm
Operating Wavelength
1260-1460, 1460-1620, or 1260-1620
nm
Channel Spacing
20
nm
Min. Channel Bandwidth @ λc
±6.5 / 7.5
nm
Max. Channel Flatness
0.4
nm
Max. Insertion Loss (Transmission Channel)
0.6
dB
Max. Insertion Loss (Reflection Channel)
0.4 - 0.6
dB
Min. Isolation (Adjacent Channel)
30
dB
Min. Isolation (Non-Adjacent Channel)
40
dB
Min. Isolation (Reflection Channel)
12
dB
Directionality
55
dB
Min. Return Loss
50
dB
Min. Extinction Ratio @ 23°C
20
dB
Thermal Stability (Wavelength)
0.003
nm/°C
Thermal Stability (Insertion Loss)
0.005
dB/°C
Max. Power Handling (CW)
500
mW
Package Dimensions
dia. 5.5 x 35 mm
mm
Operating Temperature
0 to +70
°C
Storage Temperature
-40 to +85
°C
Technical Datasheet Note
With connectors, handling power is limited to 1W; IL increases by 0.3 dB, RL decreases by 5 dB and ER decreases by 2 dB. Default connector key is aligned to the slow axis.
With connectors, handling power is limited to 1W; IL increases by 0.3 dB, RL decreases by 5 dB and ER decreases by 2 dB. Default connector key is aligned to the slow axis.
Configuration and ordering notes
Designed for standard ITU CWDM grid multiplexing and de-multiplexing with polarization preservation. Configuration options include transmission and reflection channels based on network plan.
Selection Guidance: Compare TFF vs FBT multiplexing and ASE suppression in our WDM & Optical Filters for EDFA Guide ↗ or PM WDM Selection Guide ↗.
Key Applications
CWDM systems; CWDM / OADM modules; Optical add-drop multiplexing networks; Fiber sensing arrays.
Package Drawing
Need an exact configuration?
A quotation review can begin with the application, quantity and available component information. Wavelength, optical power, fiber and termination details can be clarified with engineering.