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).
Coarse Wavelength Division Multiplexing (CWDM) is a type of optical
wavelength management device that are based on proven ultra
low-loss thin-film filter (TFF) technology. It features small size,
high reliability, high extensibility, simultaneous transmission of
multi-wavelength.
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.
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 |
Ordering Information
| CWDM | | | | | |
| Channel Spacing | Pass Channel | Fiber Type | Fiber Length | Connector |
| C=CWDM Grid
| 27=1270nm …… 47=1470nm 49=1490nm …… 61=1610nm | 1=Bare Fiber 2=900um Loose tube | 1=1m 2=2m 3=Customized | 0=None 1=FC/APC 2=FC/PC 3=SC/APC 4=SC/PC 5=ST 6=LC |
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
