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
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
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.