News

30 June 2009

 

Mitsubishi launches lower-power, wider-temperature-range 1.3-micron TOSA for 10Gb/s

Tokyo-based Mitsubishi Electric Corp is shipping samples (priced at 20,000 yen) of the FU-456RDF-9M2 1.3-micron transmitter optical sub-assembly (TOSA) laser module for 10Gb/s optical transmission. The module complies with the two standards for optical transceivers—the XFP 10Gb/s small-form-factor pluggable module and the SFP+ enhanced 8.5 and 10Gb/s small-form-factor pluggable module—as well as the XMD MSA (10Gb/s miniature device multi-source agreement) standard for optical transmission devices.

Mitsubishi Electric says that carriers have been rushing to expand metro-area fiber-optic communications networks in response to the recent increase in traffic due to the spread of ADSL, fiber-to-the-home (FTTH), and other high-speed, large-volume communication services for the residential market. Similarly, there is growing demand to increase optical transmission capacity in high-speed storage-area networks (SANs), e.g. for transmitting music, images and other digital content, or for high-volume corporate databases.

In these networks, the mechanics and electronics in optical transceivers follow either the XFP or SFP+ standards for 10Gb/s optical transceivers, while the mechanics and electronics in optical devices follow the XMD-MSA standard. With increasing demand for high-density mounting of optical transceivers to release internal heat from the devices, optical transceivers need to operate with lower power consumption and over a wider temperature range, says Mitsubishi Electric.

The FU-456RDF-9M2 therefore incorporates a newly developed, distributed feedback laser diode (DFB-LD) that enables it to be operated at -20ºC to 95ºC (a wider temperature range than -5ºC to 85ºC for the previous FU-456RDF-8M2 TOSA). Despite this, the new model has the same compact package size (compliant with the XMD MSA).

Also, typically, TOSAs use a large amount of electricity to attain a fast enough response for 10Gb/s high-speed transmission. To reduce power consumption in optical transceivers, it is essential for DFB-LDs to operate at a lower current, says Mitsubishi Electric. At 25ºC, the new, highly efficient DFB-LD can operate at 25mA (40% less than the previous model's 35mA). This should lead to lower power consumption in networks, says the firm.

Mitsubishi Electric aims to continue development to further increase the performance and output of the TOSA. The firm also plans to further expand its product lineup.

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