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All Blog Articles / WDM & FTTX / Introduction of OEO Media Converter Based WDM System

Introduction of OEO Media Converter Based WDM System

Posted on by FS.COM

The evolution of WDM systems stemmed from a need to increase the capacity of a single fiber, and thus the network traffic volume is increasing and the demand for more network bandwidth is also on the rise. By converting incoming optical signals into the precise ITU-standard wavelengths to be multiplexed, OEO media converter are currently a key determinant of the openness of CWDM and DWDM systems. This article is mainly to introduce the OEO transponder based WDM system.

What’s OEO Media Converter/Wavelength Converter?

OEO media converter, also called WDM transponder, is an optical-electrical-optical (O-E-O) wavelength converters which is designed to perform an O-E-O operation to convert wavelengths of light. The transponder can convert Ethernet signals into a corresponding wavelength in CWDM and DWDM network infrastructures. From left to right, the transponder receives an optical bitstream operating at one particular wavelength. And then it converts the operating wavelength of the incoming bitstream to an ITU-compliant wavelength and transmits its output into a CWDM or DWDM system. On the receive side (right to left), the process is reversed.

WDM transponder

Working Principle of OEO Media Converter/Wavelength Converter

OEO media converter realizes wavelength converter based on the Optical-Electrical-Optical transformation technology. Firstly, the OEO optical transponder receives the optical signals and converts it into electrical signals through the Optical-Electrical conversion. And then, using the 3R technology (re-amplifying, re-shaping and re-timing) to handle the signals. At last, electrical signals are modulated to the optical laser and then output. By this process, optical signal transmission distance therefore can be longer than before. As shown in the figure below, by using the OEO converter, the transmission distance reach up to 40km.

oeo fiber optic repeater

What’s the Function of OEO Media Converter/Wavelength Converter?

Besides the wavelength conversion, WDM transponders can also be deployed in seamless integration of different fiber types by converting multimode fiber to single mode fiber, dual fiber to single fiber. It can also be used as a repeater to convert the weak optical signals from the fiber into electrical signals, and regenerates or amplifies, then recovers them into strong optical signals for continuous transmission.

Wavelength Conversion

As we all know, when add a CWDM or DWDM Mux/Demux into a WDM network, there is a requirement to convert the optical wavelengths like 850nm, 1310nm and 1550nm to CWDM or DWDM wavelengths. Then the OEO transponder comes to assist. Wavelength conversion is the most common function of the OEO media converter.

Fiber Mode Conversion

In general, multimode fiber (MMF) is used for short-distance transmission while the single mode fiber (SMF) is used for the longer-distance transmission. If our network equipment is designed with multimode port, but we want to achieve longer transmission distance only single mode fiber can achieve, then we need OEO media converter to complete mode conversion.

Fiber Count Conversion

Dual fiber transmission and single fiber transmission are two transmission modes applied in the network. Depending on the type of equipment and the fiber installed facility, dual fiber to single fiber conversion is required sometimes. OEO media converter can be used to solve this problem.

Signal Repeating

In long haul fiber optic transmission, OEO transponder also can work as repeater to extend network distance by converting wavelengths and amplifying optical power. The OEO converter converts the weak optical signals from the fiber into electrical signals, and regenerates or amplifies, then recovers them into strong optical signals for continuous transmission. For this reason, OEO media converter is also called OEO fiber optic repeater.

FS.COM FMT Integrated OEO Media Converter Solution

FS.COM OEO WDM transponder comes with 8x SFP/SFP+ ports that can support 3R function for longer distances. It can convert 1G~11.3 Gbps Ethernet signals into a corresponding wavelength in CWDM and DWDM network infrastructures. The WDM OEO converter can be used as a transponder or as a repeater and regenerator. It provides a range of options for repeating optical data signals, converting them to other optical or electrical formats, or combining multiple fibers onto a single fiber. Besides this one, FS.COM also provides custom service for OEO converter, you can design the right one according to your specific needs.

wavelength converter

FS.COM OEO transponders are made into small plug-in cards to be used on the our FMT platform. FMT platform makes devices like EDFA, OEO, DCM, OLP and VOA into plug-in cards and provides standard rack units as well as free software to achieve better management and monitoring. As a part of FMT system, hot-swappable OEO plug-in card only occupies 1 slot in the 1U/2U/4U chassis. And all FMT line cards can be installed and removed without any tools with the unique screw design. The flexible all-in-one-design enables simple and fast plug & play installation.

oeo transponder, wavelength converter