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Apogee, Vitesse offer transmission performance for 10Gbps optical module

Posted: 08 Sep 2005 ?? ?Print Version ?Bookmark and Share

Keywords:10gps optical module? xfp transceiver?

Apogee Photonics Inc. and Vitesse Semiconductor have developed a joint reference design that extends 10Gbps transceiver performance to an industrial temperature range.

The companies said the reference design allows customers to quickly and confidently deploy high-speed optical links in the most demanding environmental conditions, including the outside plant associated with PON backhaul applications, while maintaining exceptional XFP transceiver SONET eye mask margins of 20 percent average over case temperatures ranging from minus 40 degrees C to +85C&deg.

Since the initial deployment of 10Gbps optical modules, industry demand for higher module performance over industrial temperature ranges is rapidly growing. At elevated temperatures, directly modulated laser (DML) technology has proven asymmetrical performance resulting in reduced eye mask margin and degradation in overall link budget even with increased signal amplitude. Module manufacturers now look to electroabsorption-modulated-laser (EML) technology to provide the stable and symmetric performance they require based on the robust temperature insensitivity of EML bandwidth.

The joint reference design solution includes Vitesse's XFP PRO PCB layout with its VSC7982 driver IC and the Apogee Photonics 10T3081 EML TOSA. The VSC7982 supports case temperatures up to 100C&deg and the 10T3081 up to 95&deg TOSA case temperature. Industrial XFP solutions using the above combination, together with the Vitesse VSC8239 dual signal conditioner and VSC7978 transimpedance amplifier IC, achieve less than 2.5W total power consumption, lower than comparable DML solutions.

The Apogee Photonics 10T3081 EML is built using the company's patented Asymmetric TwinGuide (ATG) technology, a highly scalable platform for monolithic photonic integration, enabling uncooled EML manufacturing with high chip and TOSA yields and lower cost than competing uncooled DML platforms. The Apogee Photonics 1310nm EML platform also provides industry-leading reliability in an uncooled 10Gbps laser source.

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