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News Article

Sumitomo Electric to Ship New Suite of Transceivers Containing World's Smallest Optical LD Module

Source: Sumitomo Electric Industries

Samples shipped in preparation for mass production later this year.

Tokyo, Japan. Sumitomo Electric Industries, Ltd. has started shipping samples of its SCP6000 series of small-form-factor-pluggable (SFP) optical transceivers that contain the world s smallest optical laser diode (LD) module. SEI will ship two sample types of transceiver from its SCP6000 series. Both send and receive light signals across optical networks at 2.5 Gbps and have a 2R (reshape, regenerate) function.

One type, the SCP6828-XL, has a 1.3µm wavelength LD, and can send signals a distance of 2 kilometers, while the other, the SCP6808-XL, which also has a 1.3µm LD, can transmit for 15 km.

These transceivers are based on technology from the SFF industry standard-compliant SCM6000 series, which were released in 1999, and are half the size of earlier SC duplex connectors. The newer devices are SFP-compliant, allowing network operators to easily remove or add optical cables.

The smaller-sized transceivers allow designers to fit more transceivers on the same sized circuit boards, and are the result of SEI s efforts to offer network equipment makers a wide range of optical transceivers that can meet their design and budget requirements.

The reduction in size of the transceiver is due to the development of a mini transmitter optical sub-assembly (mini-TOSA), which has a maximum diameter of 4.0 mm and is the world s smallest long-wavelength LD module. The mini-TOSA has improved header, lens and sleeve design, yet retains the efficiency and high-performance of SEI s earlier LD modules.

The SCP6000 series use LC duplex connectors The spacing between the transmitter and receiver in LC duplex connectors is only 6.25 millimeters, about half the distance of the spacing in SC duplex connectors used in SMF-ATM. The mini-TOSA can be installed in this small space in LC duplex connectors.

After their installation in 3.8 mm diameter header of a mini-TOSA, the LD and the photo diode (PD) are sealed in an air-tight, nitrogen-filled atmosphere just as in earlier models. A mini-TOSA has a tiny, high-refractive-index ball lens and a 1.25-mm-diameter sleeve that efficiently pass the light transmitted from the LD to the fiber.

SCP6000 transceivers are mounted on the industry-standard card-edge type electric connectors. The samples to be shipped will support ITU-T G.957 (synchronous digital hierarchy standard) applications and Bellcore GR-253 (synchronous optical network industry standard) applications.

Later, SEI will release additional models with 1.55µm wavelength LD and avalanche photo diode (APD) for long-distance transmission, as well as models with transmission speeds of 156 Mbps, 622 Mbps, and 1.25 Gbps. An additional peripheral interface controller will also allow remote monitoring of features such as the intensity of the light s emission and reception, the LD drive current and temperature, facilitating system maintenance and management.

The manufacturer s name, model number, transmission speed, and wavelength are all stored in the device s EEPROM memory, allowing network operators to read out the information and identify the installed SFP optical transceiver.

About SEI -- Sumitomo Electric Industries Ltd., one of the world-leading manufacturers of optical fibers and components, is at the forefront of the on-going information revolution. A global leader in DWDM technology, SEI also markets sophisticated information systems such as optical fiber LANs, traffic control systems and CATV networks, all of which represent the successful integration of different technologies. By responding to the challenges of social and economic internationalization, and consolidating its position as a key player in the global information revolution, SEI can confidently look forward to another century of innovation and growth. Net sales for the year ended March 31, 2001 were 1,478 billion yen.

Contact: Yutaka Saiki Corporate Communications Department Sumitomo Electric Industries Ltd. Tel: +81 6 6220 4119 www@prs.sei.co.jp or Jim Bonner Senior Editor Nippon Digital Communications Tel: +81 3 5623 1403 bonner@nippondigi.com

Yutaka Saiki
Corporate Communications Department
Sumitomo Electric Industries Ltd.
Tel: +81 6 6220 4119
www@prs.sei.co.jp
or
Jim Bonner
Senior Editor
Nippon Digital Communications
Tel: +81 3 5623 1403
bonner@nippondigi.com
E-mail: bonner@nippondigi.com
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