CWDM was firstly developed as a WDM technology to increase the bandwidth of an optical fiber by multiplexing several wavelengths (or colors) onto it. CWDM Mux Demux have long been widely used as the most cost-effective and budget saving method for SDH (STM-1, STM-4, STM-16, STM- 64), IP (Fast Ethernet, Gigabit Ethernet, 10 Gigabit) ATM and storage (1G, 2G, 4G, 8G, 10G Fiber Channel) networks.
However, a CWDM network only supports up to 18 different channel wavelength, and CWDM transmission distance is shorter than DWDM because standard amplifier cannot cover all the CWDM operating wavelength. Network operators must optimize their network infrastructure if they hope to meet the ever-growing need for bandwidth. So there comes a need of deploying DWDM network over the existing CWDM network.
DWDM wavelengths have much smaller channel spaces (0.4nm/0.8nm/1.6nm) than CWDM 20nm channel space, so DWDM can provide larger bandwidth than CWDM. DWDM C-Band features the lowest fiber attenuation and standard optical EDFA amplifiers can be used to extend the bridgeable distance. At the meanwhile, DWDM overlap with CWDM band near the 1530nm and 1550nm. This overlap provides the possibility of combining DWDM with CWDM to increase network capacity.
How to Build DWDM over CWDM Network
CWDM 1530nm filter can cover DWDM channel wavelengths from 1528.77nm to 1538.19nm, commonly used 10 channels from 1529.55nm to 1536.61nm as DWDM multiplexer and de-multiplexer
CWDM 1550nm filter can cover DWDM channel wavelengths from 1543.73nm to 1557.36nm, commonly used 8+8 total 16channels DWDM multiplexer and de-multiplexer.
So that total 26CH DWDM wavelengths can be added into a 6CH CWDM link. By this DWDM over CWDM combined solution, larger network capacity will be sharing the same fiber link, network transmission distance can be extended by a lot, the existing CWDM system can be upgraded without replacing or leasing any extra fiber facilities.
DWDM over CWDM bridge for 8CH+8CH+10CH+6CH with Monitor and 1310nm port
Model No: AMCD32MDXXXXGA1U
Please feel free to contact us for datasheet and offer via shawn@arkoptics.com
This is a customized DWDM over CWDM combination for dual fiber operation.
26CH DWDM+6CH CWDM with 1% ratio monitor and legacy 1310nm port.
CWDM operating wavelength with 6 high channels:
1470, 1490, 1510, 1570, 1590, 1610nm
CWDM 1530nm filter will be used to express the 100GHz DWDM with C-Band channels with 10 wavelengths:
C51 C52 C53 C54 C55 C56 C57 C58 C59 C60.
CWDM 1550nm filter will be used to express the 100GHz DWDM with C-Band channels with 16 wavelengths:
C25 C26 C27 C28 C29 C30 C31 C32 C34 C35 C36 C37 C38 C39 C40 C41
Total 32 channels are sharing same fiber link.
Thin-Film-Filter technology features with ultra low channel loss and link loss.
Special ports
Monitor port taps off about 1% of transmitted and received line signal to be used for channel powers and link conditions monitoring. This will provide network operators a way of easy troubleshooting at real time.
The 1310nm port can be overlaid the existing 1310nm legacy traffic to line. It鈥檚 wide for 1G, 10G, 40G and 100G. Also it can be used to extend another CWDM access unit carrying low channel wavelengths of 1270, 1290, 1310, 1330 and 1350nm. So a 26CH+6CH+5CH configuration network will be sharing the same dark fiber.
Arkoptics strictly perform application test in end-use conditions, we inspect and ensure every fiber port to be super clean conditions, we stand behind of our quality and promise our clients a limited lifetime warranty.
We are providing the most reliable and most cost-effective DWDM over CWDM solutions to meet customers鈥?different network applications. Our DWDM over CWDM combination multiplexers are widely used by operators in Europe.
If you are interesting in our hybrid DWDM and CWDM products, please call us or email via shawn@arkoptics.com. Thank you.
FAQ
Q: How to deploy a hybrid CWDM/DWDM network over one pair of fiber?
A: This could be achieved by connecting the 1530nm or 1550nm CWDM channel to the line port of DWDM Mux Demux. CWDM 1530nm matches to narrowband C53-C60 of DWDM, CWDM 1550nm matches to narrowband C27-C42 of DWDM. To customized your DWDM over CWDM combination solution, please don鈥檛 hesitate to email us for more cost-effective solutions.Customized DWDM Mux Demux
website:http://www.arkopticals.com/passive-multiplexer/dwdm-mux-demux/