What Is WDM (Wavelength Division Multiplexing)?
WDM technology increases network bandwidth by multiplexing many wavelengths of light onto a single optical fiber. Each wavelength represents a different data signal.
At the terminal site, a DWDM de-multiplexer separates the multi-wavelength optical signal into individual data signals for transmission to client-layer systems. Early CWDM transponders were “garbage in garbage out” with only rudimentary digital domain signal integrity monitoring.
1. Low Insertion Loss
WDM (Wavelength Division Multiplexing) is the technology that combine a series of optical carrier signals with different wavelengths (carrying various information) and coupled to one optical fiber for transmission at the transmitting end. Then the optical carrier signals are separated by a demultiplexer and then processed by an optical receiver to restore the original signal at the receiving end. This technique greatly expands the bandwidth capacity of optical fibers.
The fwdm-filter-wavelength-division-multiplexer is a device that separates or combines multiwavelength signal at a specific wavelength range and offers high channel isolation degrees, low insertion loss, polarization independence and excellent environmental stability and power handling capability. It is based on the mature membrane filter technology and has been widely used in EDFA, Raman amplification, WDM networks and fiber optics instrumentation.
Compared with the coarse wavelength-division-multiplexing (CWDM) that uses broad band wavelengths and broader channel spacing, DWDM is much more tightly spaced and allows 40, 80 or even 160 wavelengths to be simultaneously transmitted over a single optical fiber. This increased capacity greatly reduces network bandwidth and transmission cost. However, it also requires a much higher-precision optical receiver in order to accurately extract the desired wavelength.
FOCONEC supplies ABS box type DWDM fwdm-filter-wavelength-division-multiplexer Module with 3 ports which can multiplex and separate 1310 / 1490 / 1550 nm signals that carry voice, data and video services in FTTH systems. It is bi-directional and provides a total output capacity of 2.5Gbps.
2. High Isolation
Optical signals carry information in wavelengths, and can be combined or separated by multiplexers or demultiplexers. When multiple wavelengths are transmitted simultaneously over one optical fiber, it is called wavelength division multiplexing (WDM). Combined with erbium doped fiber amplifiers or Raman amplifiers for increased capacity and range, DWDM systems can reach thousands of kilometers.
To ensure robust operation in densely packed channels, high-precision filters are required. Using a filter wavelength division multiplexer, or a CWDM filter multiplexer, allows for the separation of the signal at the desired wavelength. This eliminates the interference with other wavelengths and reduces transmission noise.
Filter WDMs can be used in many applications including EDFA, Raman Amplifiers, Gigabit PON (FTTx) system, DWDM optical network and fiber optics instrumentation. They offer very low insertion loss, low polarization dependence, and high isolation. They are also characterized by excellent environmental stability and high power handling capability.
FS FWDMs are available in both C Band and L Band, allowing the multiplexing of communication signals with bite-rate up to 10G. Moreover, they can expand the capacity of a single fiber to achieve bidirectional communication, which is widely used in the FTTH/FTTx and CATV system to save fiber resources and networking costs and conduct business. It is ideal for broadband services, optical network upgrade and expansion and other applications.
3. Low Temperature Sensitivity
WDM is a fiber-optic technology that enables multiple light wavelengths or colors to carry data on the same optical fiber. The multiple wavelengths are combined at the transmitting end of the optical network through a Multiplexer and separated at the receiving end through a Demultiplexer. By using this technique, the capacity of optical fiber can be increased without laying additional fibers. Optical signals can also be transmitted in both directions simultaneously on the same optical fiber by using bidirectional WDM.
The fwdm-filter-wavelength-division-multiplexer is a micro-optic device that uses interference filter technology to combine or separate 1310 and 1550 nm optical signal for transmission. It is a high-performance device with a wide passband, low insertion loss, high isolation, and excellent environmental stability. It is an ideal component for EDFA fiber amplifiers and WDM networks.
The fwdm-filter-wavelength-division-multiplexer has two types of isolation, standard isolation and high isolation. The high-isolation model is especially useful for separating signals in a dense WDM system because it allows more channels to be packed closer together. This helps to minimize the power consumption of a WDM system and reduce the cost of power supply units. The fwdm-filter-wavelength-division-multiplexer features a low temperature dependent loss and polarization sensitivity, making it an excellent choice for telecommunication and WDM network applications. This product is available in a variety of channel wavelengths and package sizes to meet your application needs.
4. High Power Handling Capability
Optical FWDM technology allows multiple signals to be transmitted over a single optical fiber, increasing the bandwidth capacity of a communication system. This enables the transmission of higher bit rate data streams, resulting in increased speed and efficiency. It also reduces the need for additional fibers, saving money in terms of deployment and maintenance.
A FWDM consists of a series of optical filters that transmit specific wavelengths while reflecting other wavelengths. The lgx-plc-splitters filter array can be combined or separated using a demultiplexer at the receiving end. Optical FWDM is a cost-efficient way to increase bandwidth in existing fiber networks and can be easily expanded as demand grows.
When choosing an optical FWDM, consider the following features:
1.Wavelength Range: Choose a FWDM that supports the wavelengths required for your application. This will ensure that your signal is transmitted at the correct frequency and that it is received in the right condition.
2.Channel Configuration: Depending on your needs, you may require a FWDM with a different number of channels. Choose a FWDM that is capable of accommodating the number of data channels you need to transmit.
3.Isolation: Choose a FWDM with high isolation to ensure that your signal is properly isolated from other channels. This will improve the quality of your signal and minimize crosstalk.
Optical FWDM is used in a variety of applications, including telecommunications and cable television. It provides a reliable and cost-efficient solution to increase network bandwidth and enable high-quality video streaming. It is also being used in healthcare to transfer medical images such as X-rays and MRI scans over long distances for remote diagnosis and consultation.