TOKYO -- Sumitomo Electric Industries Ltd. (SEI; TSE: 5802) is now shipping in production volumes Small Form-factor Pluggable (SFP) optical transceivers for coarse wavelength-division multiplexing (CWDM) applications.

The transceivers are available in eight ITU-compliant CWDM wavelengths from 1470 nm to 1610 nm. Transceivers for eight additional wavelengths in the 1300-nm region will be available later this year.

Using SEI's high-performance, uncooled DFB lasers and optimum thermal design of devices and circuitry, the transceivers combine excellent transmission characteristics and low cost.

Supporting 1.25 Gb/s Gigabit Ethernet, 2.5 Gb/s STM-16/OC-48, and 2.7 Gb/s STM-16/OC-48 with FEC, the transceivers achieve transmission distances of 40 km with a PIN photodiode receiver or 80 km with an APD.

To ease application and operation, the transceivers include built-in digital diagnostic functions and operate from a single 3.3-Vdc supply. They comply fully with the SFP multisource agreement.

The new CWDM transceivers extend SEIfs already broad line of SFP transceivers for data and telecom applications.

In producing the transceivers, SEI has been granted a license from Finisar Corporation for the following patents: US 5,019,769 and US 6,439,918.

Sumitomo Electric Industries Ltd.