What is DDM/DOM for fiber optic transceiver?
2017-07-06
Usually when we buy SFP transceivers, we will have options with its DDM functions, so what is DDM? Obviously a SFP with DDM is high-ender than one which without DDM functions. What the DDM use for?
DDM is Digital-diagnostic-monitoring (this feature is also known as digital optical monitoring (DOM)) which provides a user with critical information concerning the status of the transmitted and received signals. This approach allows for better fault isolation and error detection.
Digital diagnostics monitor the SFP module’s temperature, receiver power, transmitter bias current, and transmitter power. Usually, the output of the physical value of each parameter is an analog voltage or current from the Trans impedance amplifier, the laser driver, or the post amplifier. Engineers use ADCs to digitize those physical values. With the digitized value, a microcontroller can then either process data as part of a control loop, trigger an alarm, or just record the data into a register.
SFP+ module,SFP+ transceiver,bidi sfp,XFP module,XFP transceiver Which is good? First choice Fiberland！Thanks for your concern, to learn more about Fiberland, please enter Fiberland website: http://www.fiberlandtec.com/
DDM is Digital-diagnostic-monitoring (this feature is also known as digital optical monitoring (DOM)) which provides a user with critical information concerning the status of the transmitted and received signals. This approach allows for better fault isolation and error detection.
Digital diagnostics monitor the SFP module’s temperature, receiver power, transmitter bias current, and transmitter power. Usually, the output of the physical value of each parameter is an analog voltage or current from the Trans impedance amplifier, the laser driver, or the post amplifier. Engineers use ADCs to digitize those physical values. With the digitized value, a microcontroller can then either process data as part of a control loop, trigger an alarm, or just record the data into a register.
SFP+ module,SFP+ transceiver,bidi sfp,XFP module,XFP transceiver Which is good? First choice Fiberland！Thanks for your concern, to learn more about Fiberland, please enter Fiberland website: http://www.fiberlandtec.com/
RECENT BLOG POST
-
012019-10With the continuous development of 5G communication technology, 100G modules are gradually becoming popular. We know that there are many kinds of packages for 100G optical modules. From 2000 to now, the optical module package types have been rapidly developed. Its main package types are: GBIC, SFP, XENPAK, SNAP12, X2, XFP, SFP+, QSFP/QSFP+, CFP, CXP. In the fast-developing network era, some 100G optical modules avoid the risk of being eliminated, and upgraded and revised with the wave of the Internet, such as 100G CFP optical modules.
-
012019-101. What is the CWDM SFP? The CWDM optical module is an optical module using CWDM technology to implement the connection between the existing network device and the CWDM multiplexer/demultiplexer. When used with a CWDM multiplexer/demultiplexer, CWDM optical modules can increase network capacity by transmitting multiple data channels with separate optical wavelengths (1270 nm to 1610 nm) on the same single fiber.
-
012019-10AOC is the abbreviation of Active Optical Cables, which is called Active Optical Cables in Chinese. AOC active optical is to encapsulate two optical modules and cable together. Because the medium of transmission in the middle is optical cable, AOC optical module, which contains laser devices, has a higher price for DAC. However, its optical aperture is not exposed, it has high reliability, and its working distance can be customized for a long distance of less than 100 meters.
-
012019-10Dense Wavelength Division Multiplexing (DWDM) technology is capable of transmitting data in an optical fiber using bit wavelength parallel transmission or string line transmission using the wavelength of the laser.It is widely used in different fields of communication networks, including long-distance backbone networks, metropolitan area networks (MANs), residential access networks, and local area networks (LANs).The DWDM optical module is the optical module that uses this technology, so the DWDM optical module has high bandwidth and long-distance transmission characteristics.
