Fiberstore supply CWDM is really a low-cost WDM transmission technology

From the Internet,we all know some information about fiber optic communication so we know that increasingly more crucial in life. So we must to know more info in fiber optic.CWDM(Coarse Wavelength Division Multiplexing) is really a low-cost WDM transmission technology for metro access layer. Principle, CWDM is the use of the optical multiplexer to various wavelengths of light signals multiplexed with a single optical fiber for transmission, in the receiving end of the link, using the optical demultiplexer fiber mixed signal is decomposed into different wavelengths signal, connected to the respective receiving apparatus.The real difference is always that using the DWDM: 0.2nm to a single.2nm wavelength interval with regards to the DWDM system is concerned, CWDM includes a wider wavelength interval, a accepted standards wavelength intervals of 20 nm.

CWDM wavelength interval width, the technical requirements from the laser. Because the wavelength interval of 20nm, the utmost wavelength shift with the system approximately -6.5 ℃~ 6.5 ℃, the precision of the laser emission wavelength could be relaxed to ±3nm, and the operating temperature range (-5 ℃ ~ 70 ℃), the temperature change induced wavelength drift continues to be inside allowable range, the laser without temperature control mechanism, therefore the structure from the laser is greatly simplified as well as the yield is increased.

Additionally, a sizable wavelength interval signifies that the optical multiplexer / demultiplexer structure is greatly simplified. As an example, a CWDM system filter coating Floors could be reduced to around 50 layers, and the the DWDM systems 100GHz filter coating Floors of around 150 layers, which results in increased yield, cost reduction, and the supplier from the filter is greatly increased pro-competitive. CWDM filter of cost than DWDM filter is cheaper than 50%, the Moreover, using the automated production technology and also the almost all the growth will probably be further reduced.

CWDM multiplexer technology, the largest concern is still not obvious cost advantage in accordance with the DWDM equipment. Optical transceiver modules and optical devices is paramount to reducing costs. However, due to the small market, suppliers shipments, and so the device cost advantage isn't obvious. Further, a technique for reducing price is to simplify the unit function, this process leads to reduced system reliability and manageability. The DWDM product prices continue to lower to the CWDM technology a lot of pressure, and can form an entire metro DWDM network using DWDM technology, scalability, and the pressure of CWDM.

The quantity of the CWDM device supports optical channel (wavelength) is not a lot more than 8, E-band optical transceiver module manufacturing process isn't yet ripe, In addition, the elimination of the lake absorption peak G.652C optic cable in existing network applications less E-band optical transceiver module market demand. The bigger rate and farther transmission distance CWDM system you can still find many technical problems. 10G system dispersion, ultra-broadband optical amplification technology. In addition, the standardization process needs to be accelerated, specially the to want operators boot service interface function. Therefore, we also launched DWDM 100g/200g Module to your choice.