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Mitsubishi offers uncooled 2.5 Gbit/s laser diodes

The Electronic Device Group of Mitsubishi Electric & Electronics USA has introduced two new cost-effective uncooled 2.5 Gbit/s laser diodes. The ML9XX19 is a DFB laser based on InGaAsP and is designed for 1550 nm long-reach coarse WDM (CWDM) communications up to 100 km. The ML7XX19 is an InGaAsP Fabry-Perot (FP) version that meets the demands of 1310 nm short-reach communications up to 2 km.

"These uncooled laser diodes substantially reduce space and power consumption over equivalent cooled products and have a greater resistance to wide environmental temperature swings," said Daniel Chen, assistant VP of high-frequency products for Mitsubishi Electric & Electronics USA, Inc.

DFB laser

Mitsubishi Electric s ML9XX19 DFB laser diode is suited to long-reach 2.5 Gbit/s CWDM applications such as trunklines for metropolitan area networks. The device operates over a temperature range of 0 to +70C without a cooler, which produces a device with one-fifth the volume and one-half the power consumption of an equivalent cooled DFB laser diode. The ML9XX19 uses quarter-wavelength phase-shifted grating to achieve stable single-mode operation, which results in a lower bit error rate throughout its wide temperature range. The device is also available in a standard TO-CAN package, which makes design easier and lowers overall system costs. Other features include a typical side mode suppression ratio of 40 dB, a dispersion penalty of 1.5 dB and typical rise and fall times of 100 ps.

Fabry Perot laser

The company s ML7XX19 FP laser diode delivers high-speed performance to cost-sensitive optical box-to-box links. The FP design enables extremely reliable performance at a typical output power of 5 mW throughout an extremely wide temperature range -40 to +85C). The device reduces system design cost by eliminating the cooler and by using a standard TO-CAN package, which results in modules with a smaller footprint and lower power consumption. The device is designed for single transverse mode oscillation as a result of the more stable signal and improved transmission characteristics, which leads to lower bit error rates. The relaxation oscillation frequency is 6.5 GHz at 25 C, and the typical rise and fall times is 200 ps.

Both devices are in volume production and available in 5.6 mm TO-CAN packages, with 3.8 mm TO-CAN packages available by the second quarter of 2002. The ML9XX19 and ML7XX19 are priced at $160 each and $22, respectively (in volume quantities). Mitsubishi Electric & Electronics USA, Inc.
John Garner
Tel. +1 408 774 3191
or
Positio Investor & Public Relations
Dave Richardson
Tel. +1 650 815 1006, Ext. 108
dave@positiopr.com
E-mail: garner_john@edg.mea.com or
Web site: http://www.mitsubishichips.com

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