Coarse wavelength division multiplexer (CWDM) is a low cost WDM transmission technology for man access layer. In principle, CWDM USES optical multiplexer to multiplex optical signals of different wavelengths to a single optical fiber for transmission. At the receiving end of the link, the mixed signals in the optical fiber are decomposed into signals of different wavelengths by means of optical demultiplexer and connected to the corresponding receiving equipment.
Model Number : CWDM DWDM . Application: FTTH FTTB FTTX Network
Connector : SC LC FC ST Channel : 4/8/16Channel
Wavelength: 1310/1490/1550nm Package : 19’ 1U rack mount, ABS Box .
CWDM adopts thin film filter technology with good wavelength stability and can be configured with upgraded ports according to requirements with low insertion loss, high isolation, performance stability and high temperature stability. Generally divided into 4 channels, 8 channels, 16 channels or up to 18 channels coarse wavelength division multiplexer. Due to the low insertion loss requirement of rough-wave subsystem, when there are many channels, the module can add jumpers to reduce the insertion loss of each channel. Common rough wave packaging forms are: ABS box, LGX box and 19 inch 1U case packaging.
Channel Wavelength (nm)
Center wavelength Accuracy (nm)
Channel Spacing (nm)
Channel Passband (@-0.5dB bandwidth (nm)
Insertion Loss (dB)
Channel Uniformity (dB)
Channel Ripple (dB)
Inertion Loss Temperature Sensitivity(dB/℃)
Wavelength Temperature Shifting (nm/°C)
Polarization Dependent Loss (dB)
Polarization Mode Dispersion
Return Loss (dB)
Maximum Power Handling (mW)
Opterating Temperature (°C)
Storage Temperature (°C)
Number of Channels
FTTH as the ultimate direction of future development of broadband access networks in recent years, the rapid development of its technology and applications, has become a hot technology in an international context. The company proposed FTTH solution for upscale residential district.