CCWDM (compact CWDM) module



The CCWDM module is a wavelength division multiplexing technology based on TFF (thin film filter). It works in the same way as the CWDM module. The difference is that CCWDM adopts free space technology, Compared with the CWDM module, its package size is greatly reduced, and the insertion loss is lower and the consistency is better. It can replace CWDM products and be used in TC, enterprise network, PON network, CATV and other fields.


  • Lower Insertion Loss. Lower insertion loss makes CCWDM module have lower signal attenuation in operation, thus reducing the power requirement of signal transmitter.
  • High Isolation. The higher isolation value enables sufficient signal isolation during multi-signal transmission in the CCWDM module, effectively preventing crosstalk between signals and reduces distortion of the transmission signal.
  • Mature Production Process. The CCWDM module has mature production technology, stable and reliable performance, supports the work in the harsh environment of – 25~+70 ℃, and ensures the stable transmission of signals.

Free Space Technology.
The CCWDM module uses free space technology and uses an independent sealed space to transmit optical signals. It works in the same way as CWDM. It inputs (outputs) optical signals from COM, and then outputs (inputs) optical signals through TFF (thin film filter) at other ports.

 Normal CWDM Fiber Stage Mode  CCWDM Free Space Technology


The free-space design of CCWDM modules makes it possible to easily incorporate performance monitoring.

Compact Design.
The CCWDM module o adopts parallel optical path connection stage, which is different from the optical fiber connection stage of CWDM, which saves significant space. The package size of CCWDM module accounts for about 1/4 of CWDM.

The product of CCWDM module has the characteristics of low insertion loss, high channel isolation and high environmental stability and reliability. It adopts free space technology and compact package size design. It can replace CWDM products and be used in TC, enterprise network, PON network, CATV and other fields.

CWDM transceivers

Items Unit CCWDM MUX/DEMUX Module
Operating wavelength nm 1260~1620
Channels CH 4 8 16 18
Transmission band insertion loss dB ≤1.4 ≤1.7 ≤2.0 ≤2.5
Transmission band nm ±6.5, ±7.0, ±7.5
Transmission Adjacent Isolation dB ≥30
Transmission Non-adjacent isolation dB ≥45
Return loss dB ≥45
Directivity dB ≥50
Ripple dB ≤0.5
Package dimension mm L50xW27xH7.7、L50xW44xH7.7
Operating temperature -25~+70
Fiber type 900um loose tube
Connector type LC/PC(or customize)