Optoplex Corporation proudly announces that it has started shipment of differential phase-shift keying (DPSK) demodulator, also known as Delay Line Interferometer (DLI), for 40 Gb/s fiber-optic transmission systems to several major customers in the terrestrial telecom system and subsystem industries to support their initial production of DPSK based systems. Optoplex is also supporting a number of customers in their final stage of field trial of 10 Gb/s DPSK based undersea transmission systems.

DPSK has been considered as the most promising modulation format for optical communication systems of 40 Gb/s or higher bit-rates, and for extended reach (often necessary for undersea applications) as well. DPSK modulation scheme offers a 3-dB improvement in receiver sensitivity, and provides common mode noise rejection compared with more conventional on-off keying (OOK).

With increasing maturity and availability of high-speed electronics (including PIN and TIA) for the 40 Gb/s transmission, DPSK or DQPSK based systems will be adapted for commercial and defense optical communication networks on a wider scale. Optoplex's free-space based athermal DLI (including both DPSK and DQPSK demodulators) are designed specifically for advanced optical communication systems and support bit rate from 625 Mb/s to 160 Gb/s. Standing at the forefront of free-space, athermal DLI technology, Optoplex plays a key role in pushing forward the ever-increasing adaptation of DPSK modulation technology by several major players in the telecommunication industry, for both 10- and 40-Gb/s systems.

For more information, please write to info@optoplex.com or call (510) 490-9930.