SDL, Inc. announces device to integrate DWDM and Variable Optical Attenuator

Jan. 9, 2001
SDL, Inc. (Nasdaq: SDLI) announced the first shipments of a new device that integrates both a 40-channel Dense Wavelength Division Multiplexer (DWDM), and a 40-channel Variable Optical Attenuator (VOA) into a single module.

SDL, Inc. (Nasdaq: SDLI) announced the first shipments of a new device that integrates both a 40-channel Dense Wavelength Division Multiplexer (DWDM), and a 40-channel Variable Optical Attenuator (VOA) into a single module. Based on SDL PIRI�s proprietary P-Core silica-on-silicon planar lightguide circuit technology, the device integrates the functionality of both an Arrayed Waveguide Grating (AWG) multiplexer and a thermo-optic VOA. SDL PIRI is a world leader in AWG shipments.

�Optical networking system designers now have a powerful new component, enabling flexible new architectures and new approaches to scalability. Of particular importance is the application of the integrated component technology to next-generation networks, including both long-haul and metro architectures,� said Donald R. Scifres, CEO and Chairman of SDL, Inc.

The VOA array equalizes the optical signal intensity from up to 40 separate laser sources, each with a unique wavelength. The signals are then routed to the AWG planar circuit, which performs the essential function of combining the individual laser signals onto a single fiber. The module includes a digital control subsystem allowing individual control of per-channel attenuation levels as well as fine control over multiplexer wavelengths. The wavelength control allows precision alignment of the device to the industry-standard grid of DWDM wavelengths.

About SDL:

SDL�s products power the transmission of data, voice and Internet information over fiber optic networks to meet the needs of telecommunications, dense wavelength division multiplexing (DWDM), cable television and satellite communications applications.

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