WDM Products

Everything to Know About Wavelength Division Multiplexing (WDM)

As the name suggests, the wavelength division multiplexing or WDM technique uses different light wavelengths for its processing. In fiber optic transmission, the WDM technology increases the data-carrying capacity by using multiple light wavelengths. In specific, the technology multiplexes several optical carrier signals onto a single optical fiber, using different laser light wavelengths.

People think WDM technology is new in the industry. And thus, they don’t trust the same. But truly speaking, WDM technology was developed many years ago and has been deployed across global networks. Today, technology is used in one form or another to a significant degree.

Classification of wavelength division multiplexing (WDM)

 Coarse wavelength division multiplexing (CWDM) – This is defined by wavelengths, which belong to the International Telecommunication Union (ITU). The wavelengths used in this are from 1270nm to 1610nm within 20nm channel spacing. If compared to dense wavelength division multiplexing (DWDM), the CWDM supports fewer channels. So, it becomes the ideal solution for short-range communications. It’s compact and cost-effective.

Dense wavelength division multiplexing (DWDM) – This is defined by frequencies, which is the member of International Telecommunication Union (ITU). The frequency is usually converted to wavelength for use. DWDM is capable to transport up to 80 channels in the 1550nm region. It allows huge amounts of data to travel in one single network link, so it is ideal for long-haul transmission. It’s tightly packed together. 

Differences between CWDM and DWDM

  • Channel spacing 
  • Transmission distance 
  • Modulation laser 
  • Costs

Applications included in WDM technology 

When buying WDM products online or in stores, you will come across many options. To make your purchase easy, we have listed some applications included in WDM technology. 

  • Wavelength multiplexers– Increases bandwidth capacity on existing fibers 
  • WDM filters– Routes specific wavelengths to monitoring equipment 
  • Add/Drop multiplexers– Adds/drops wavelengths along a network route 
  • Aggregation multiplexers– Manages different service providers on the same fiber

Benefits of WDM technology 

  • Transmits and receives high capacity data, which is a ready-made option for high-bandwidth transmissions
  • Boosts the intensity of optical signals for long-range transmission with the help of Erbium-Doped Fiber Amplifier
  • Ensures transmission transparency because wavelengths are independent and channels don’t interfere with each other 
  • Allows new channels without disrupting the existing traffic services, making the upgrades easier
  • Maximizes the utilization of fibers and helps to optimize overall network investments

Where should you buy WDM products?

The WDM technology will work and deliver quality service only if you get the right WDM products. Whether you are planning to buy WDM products online or offline, you should research in-depth. You should look for one of the reputable suppliers of WDM products. 

 DK Photonics is that one popular name that designs and manufactures high-quality WDM products. The company is headquartered in Shenzhen of China. You can place an order for WDM products online through our website and we will deliver them as early as possible. Our products are cost-effective and we offer the best service in the industry.