Transmit module sends 10G over multimode

A 1310nm 10Gbit/s Fabry-Perot LC transmit optical subassembly (TOSA) is designed to meet the emerging market of 10Gbit/s SFP+ and XFP 10Gbase-LRM modules.

Emcore is sampling a 1310nm 10Gbit/s Fabry-Perot LC transmit optical subassembly (TOSA) designed to meet the emerging market of 10Gbit/s SFP+ and XFP 10Gbase-LRM modules.

Emcore is a leading provider of LX4 modules for 10G links that operate up to distances of 300m over multimode fibre.

This new product offering expands Emcore's product base in 10G over multimode fibre applications by providing key components for LRM modules.

LRM is an emerging technology that provides 10Gbit/s transmission speeds over 220m multimode optical fibre links as defined by the IEEE802.3aq 10GBase-LRM standard.

LRM modules started appearing on the market in 2006 with an increasing interest in the smaller form factor SFP+ in 2007.

Emcore's Fabry-Perot LC TOSA uses an XMD-MSA compatible flex as the standard electrical interface and is available with an LC optical receptacle (with SC as an option for other form factors).

It employs Emcore's superior 1310nm Fabry-Perot laser diode designed for direct modulation and un-cooled operation over a -5 to +85C operating temperature range.

"Emcore's latest addition of the Fabry-Perot TOSA to the LRM family of products ensures we can offer an optimised transmit/receive solution for the demanding SFP+ form factor when paired with our LRM ROSA", said Dr Tom Tumolillo Jr, Product Line Manager for Devices and Components at Emcore's fibre Optics Division.

Emcore's LRM receiver optical subassembly (ROSA), which includes a 10Gbit/s InP PIN photodetector, transimpedance amplifier (TIA), and an LC or SC optical barrel complete the optimal solution for an optical to electrical interface for fibre to the module circuit board.

The ROSA has differential output and remains linear over the input power range defined in the LRM standard.

The product is optimised to work with EDC (electronic dispersion compensation) ICs to meet the linear requirements of LRM modules.

Emcore's 10Gbit/s LRM Fabry-Perot TOSAs are sampling today and these parts are fully compliant with RoHS requirements, and the 10G XMD MSA.

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