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Mitsubishi Electric Develops SFP Transceiver Module for DWDM Long-distance Transmission

Sep 12, 2007 8:00 AM

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Carriers have been rushing to expand metro-area fiber-optic communications networks with recent increases in traffic due to the spread of ADSL, fiber to the home (FTTH), and other high-speed, large-volume communication services to the residential market. To further increase the transmission volume of metro-area optical transmission devices, manufacturers have been looking for a DWDM device that is small with low power consumption that can also transmit long distances.

To accomplish this goal, Mitsubishi Electric started production of the SFP MSA-compliant, MF-27WXE-series DWDM optical communication transceiver in April of this year.

With the new MF-27WXE series, it has developed two devices aimed at further increasing transmission distance to 160km, one of the highest in the industry according to the company.

Previously, transmission distance at 2.5Gbps DWDM had been limited to 120km because of light waveform degradation from optical fiber wave dispersion properties affected by charp at time of modulation. By using a semiconductor laser developed inhouse that reduces charp as well as optimizing laser driver circuitry, Mitsubishi was able to develop a transceiver module capable of 160km long-distance transmission.

The transceiver is capable of transmission speeds from 100Mbps to 2.7Gbps, just like previous devices. This simplifies constructing optical transmission systems of varying transmission speeds, such as Fast Ethernet, SONET, STM-1/SDH OC-3, STM-4/OC-12, Gigabit Ethernet, Fibre Channel, STM-16/OC-48, and OTN-1.

By including industry SFF8472 standard-compliant DDM function, it is possible to monitor operating conditions of the module. This means a smaller, denser, lower-cost module since an external monitoring circuit is no longer needed.

Adding these two new products increases Mitsubishi Electric’s lineup of 2.5Gbps, SFP MSA-compliant optical communication transceiver modules to six. Shipment of samples of the Mitsubishi Electric MF-27WXE transceiver will begin on Oct. 1, 2007.

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