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Applied Optoelectronics Announces 25 Gbps Lasers

Distributed feedback lasers are designed for next-generation datacentres

Applied Optoelectronics, a US provider of fibre-optic access network products, has announced laser diodes operating at a data rate of up to 25Gbps. 

The new Distributed Feedback (DFB) lasers are designed for next-generation datacentres, where interconnect speeds of 25Gbps will enable higher data throughput, reduced power consumption, and reduced size.

AOI's proprietary laser manufacturing process, using advanced Molecular Beam Epitaxy, is conducted in-house at a semiconductor fab in Sugar Land, Texas.

"AOI's 18-year history of innovation as a manufacturer of advanced laser diodes has provided a solid foundation of experience, which we have leveraged in the design of these new 25Gbps devices," commented Alex Anselm, VP and head of AOI's Semiconductor Products Division. 

"Directly modulating lasers at such high frequencies requires precise control over the epitaxy process as well as many novel design features in the devices themselves. By utilising our in-house fab, we were able to optimise the design quickly and expect to move rapidly into production."

Key technical highlights of the products include: Low threshold current less than 8 mA;  slope efficiency greater than 0.25W/A; rise/fall time under 20ps; and compliancy with the Telcordia GR-468 reliability requirements

The lasers are expected to be used in 100Gbps QSFP-28 transceivers and light engines, including CLR4 and PSM4 for datacenter applications.

Laser samples are available now, with production commencing in the fourth quarter of 2015.

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