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Thursday, July 28, 2011
Optical Chip and Module Manufacturers To Advance Interoperability Among 40 Gbps Solutions

Mitsubishi Electric Corporation, OKI SEMICONDUCTOR CO.,LTD., Opnext, Inc., Renesas Electronics Corporation and Sumitomo Electric Industries, Ltd., have aggreed to follow specific guidelines in the development of 40 Gbps pluggable transceiver modules, in an effort to ensure wide compatibility of the new devices.

The companies today announced a transmitter optical sub-assembly (TOSA) and receiver optical sub-assembly (ROSA) Multi-Source Agreement (MSA) for 40 Gbps pluggable transceiver modules. The initiative was established to meet increased demand for pluggable 40 Gbps serial modules.

The member companies are planning to specify the common mechanical dimensions, footprint, pin functions and performance of the optical transmitter and receiver devices. The TOSA/ROSA MSA specifies key features including a low-profile and compact fit for pluggable modules and simple electrical interfaces that provide cost effective solutions.

The transmission speed of 40 Gbps is the highest modulation speed, commercially-available, that uses the simple light on/off keying or serial transmission scheme. 300-pin MSA transceivers using 1550 nm light source devices are widely available for the 2 km application. Recently, 40 Gbps serial transmission over 10 km was demonstrated using 1310 nm light source devices.

In addition to ITU-T 40Gbps serial transmission standards: VSR2000-3R2 for 2 km and P1I1-3D1 for 10 km, the IEEE has recently defined a 40 Gbps serial interface for 2 km (40GBASE-FR).

The demand for 40Gbps serial transmissions is growing in telecommunication, data and IP communication applications.

"The TOSA/ROSA agreement will leverage the 40 Gbps market to achieve compact, low-power consumption pluggable modules, which will provide advanced 40 Gbps serial solutions to high capacity network and storage systems," said an MSA Committee spokesperson. In the future, the MSA will continue to define specifications that consider future advanced technologies, such as 1310 nm light source devices and direct modulation lasers.

The new TOSA/ROSA MSA defines both the laser transmitter devices and the PIN Photodiode -Trans-impedance amplifier (PIN-TIA) receiver devices that comply with 40 Gbps interface standards. The MSA targets transmission modules for more than 10 km applications.

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