FREMONT,
CA, February 9, 2007 -- 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.
