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29 August 2008


Sumitomo Electric sampling coaxial laser for high-bandwidth wireless

Tokyo-based Sumitomo Electric Industries Ltd has developed a new coaxial laser diode module capable of supporting high-frequency bandwidth applications (available for sampling in Q3/2008 and for sale by the end of 2008).

The firm’s family of coaxial laser diode modules is now capable of supporting a broader frequency range of 2-5GHz. The modules can be used in mobile base-station communication systems.

Currently, bandwidth requirements are increasing due to two factors: growing demand for upgrading existing communications systems, e.g. upgrade to digital coarse wavelength division multiplexing (CWDM); and the emergence of new applications, including WiMAX. In wireless applications, the new coaxial laser diode module is capable of supporting such upgrades and new applications.

WiMAX supports three frequency bands (2.5GHz, 3.5GHz and 5.8GHz), as defined in the IEEE 802.16-2004 specifications. The new module can support both the 3.5GHz and 5.8GHz bands.

One of its key features is its capability to achieve a 5GHz bandwidth. The firm says that its experience with various assembly and packaging techniques for a variety of modules such as 10Gb/s (transmission optical sub-assembly) has enabled it to develop a high-frequency diode for new mobile applications. As a result of redesigning the built-in isolator, there is an improvement in reflection as well as a reduction of parasitic capacitance.

See related items:

Sumitomo Electric launches SFP 6G Series

SEI launches bi-directional modules for FTTH

SEI launches 8Gb/s SFP+ transceivers for Fiber Channel

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