NEC's new 10G receiver optical sub-assemblies, or ROSAs, are designed for high-speed XENPAK, XPAK, X2 and XFP optical transceiver modules aimed at MANs and LANs. The NR3312 and NR4210 series ROSAs will be available from California Eastern Laboratories.

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The NR3312 series are cost-efficient, PIN-type ROSAs with operation to 100°C, the highest heat tolerance of any 10G optical module in the industry, claimed CEL. It offers a 15°C improvement over NEC's NR3311 series modules. To match the applied voltage of customers' transimpedance amplifiers, the applied voltage of the NR3312 was reduced from +5.0 to +3.3 V, enabling the module to be used with a single-source power supply. Likewise, the NR4210 series includes highly sensitive APD-type ROSAs optimized for high-speed performance. They are designed for efficient conversion of optical signals to electronic signals with a sensitivity rating of -28 dBm--a 3 dBm improvement over earlier NR4720 series modules. The NR4210 also delivers excellent signal integrity.

Both the PIN and APD modules offer SC and LC sleeves, making them compatible with today's high-speed transceiver modules. They are also designed to support flexible printed circuit boards. Samples of both are available now. Production models of the NR3312 are scheduled to be available in July 2005, the NR4210 will be available in August 2005.