Introduction
Wavelength Division Multiplexer (WDM) is the device which uses
multiple optical maser to transmit multi beam of different
wavelengths of laser technology through a single fiber. Each signal
is transmitted in its unique channel after the data (text, voice,
video and so on) modulated. WDM can increase the existing fiber
infrastructure for phone companies and other operators.
Wavelength division multiplexing technology as a system concept,
there are 3 modes, wavelength division multiplexing at 1310 nm and
1550 nm wavelength, CWDM (Coarse Wavelength Division Multiplexing)
and DWDM (Dense Wavelength Division Multiplexing).
CWDM has gained prevalence in multi-wavelength digital transport
architectures because it enables the use of very low cost uncooled
distributed feedback (DFB) laser transmitters. Moreover, their
powering requirements are reduced and reliability is increased.
Characteristics
Low insertion loss
Wide pass band
High channel isolation
High stability and reliability
Epoxy free on optical path
Advantages
Compact Design
Good channel-to-channel uniformity
Wide Operating Wavelength:
From 1260nm to 1620nm
Wide Operating Temperature:
From -40℃ to 85℃
Specifications
| Operating wavelength(nm) | 1260～1620 |
| Center wavelength Accuracy(nm) | ±0.5 |
| Channel Spacing(nm) | 20 |
| Channel Passband (@-0.5dB bandwidth) (nm) | ＞13 |
| Insertion loss(dB) | Reflect channel | ≤0.6 |
| Pass channel | ≤0.4 |
| Insertion loss variation(dB) | ＜0.3 |
| Channel Ripple | ＜0.3 |
| Isolation(dB) | Adjacent | ＞30 |
| Non-adjacent | ＞40 |
| Insertion loss temperature sensitivity(dB/℃) | ＜0.005 |
| Polarization dependent loss(dB) | ＜0.1 |
| Polarization mode dispersion(ps) | ＜0.1 |
| Directivity(dB) | ＞50 |
| Return Loss(dB) | ＞45 |
| Maximum power handling(mW) | 300 |
We can produce WDM including the following:
CWDM device, CWDM module, 1310/1550 Filter WDM, 1310/1490/1550nm
Filter WDM, 850/1310nm Filter WDM, 980/1550nm Filter WDM
DWDM device, 100G DWDM Module, 200G DWDM Module
OADM Module (Add/Drop)
Thermal AWG Module, Athermal AWG Module
