Silicon Light Machines announces ultra-precise dynamic gain equalizer for long-haul optical networks

Fiber Optics Weekly Update, March 29, 2002

Silicon Light Machines, a subsidiary of Cypress Semiconductor, announced its Model 2200 dynamic gain equalizer (DGE) for dense wave-division multiplexing (DWDM) communication systems. The Model 2200 represents the next generation of DGE's, providing continuous, spectrally seamless gain equalization in long-haul optical networks.

"The Model 2200 DGE is a breakthrough for Cypress," said Cypress CEO T.J. Eodgers. "It's our first optical networking sub-system, one that leverages SLM's expertise in MEMS and optics as well as Cypress's world-class capabilities in optical networking and semiconductor manufacturing. It's a leading-edge product that further extends our offerings in the optical communications market beyond networking linecards to the long-haul connections between boxes."

The Model 2200 DGE works in DWDM systems, balancing channels within an unprecedented /-0.1 dB over a dynamic range of 15dB. It independently attenuates optical power over multiple spectral regions, enabling carriers to add/drop channels on demand without affecting adjacent-channel power levels regardless of channel count. The Model 2200 is the first such device to employ diffractive micro-electromechanical system (MEMS) technology with ultra-high spectral resolution.

"In DWDM systems, adding or dropping channels causes amplifier gain profiles to change," said Tom Werner, CEO of Silicon Light Machines. "Even a tiny change in power level can cause major communications problems. The Model 2200 has high attenuation accuracy, is spectrally seamless, and offers dynamic control to avoid these problems altogether. It's the next-generation DGE."

The Model 2200 DGE is a seamless one-dimensional array of variable attenuators. It provides a dynamic range of 15dB, less than 6dB of insertion loss, and -40dB of return loss. Spectral power ripple is <0.1dB; equalization time is under 1.0ms. The subsystem dissipates less than five watts of power and complies with Telcordia's GR-1221 specification (GR-63 for control electronics).

"As carriers transition to dynamic networks, they require a new grade of optical components that facilitate seamless reconfiguration," said Daryl Inniss, senior optical analyst for RHK. "Silicon Light Machines' technology is aimed at delivering precise power management in a DWDM spectrum--allowing communications providers to improve performance and extend the reach of their optical networks."

Availability

The Model 2200 DGE subsystem, including the control electronics, optics module and optical circulator, is sampling now, with full production expected in 1H02.