The constant intensity downstream DPSK
signal is demodulated by a 1-bit delayed interferometer (DI) and balanced photo diodes.
The BER for coherent DPSK
demodulation can be calculated as
Zhang, "A novel bidirectional RSOA based WDM-PON with downstream DPSK
and upstream re-modulated OOK data", in 11th Int.
Tucker, "Chromatic Dispersion and PMD Mitigation at 10 Gb/s using Viterbi Equalization for DPSK
and DQPSK Modulation Formats" Opt.
Started production shipments of its 40G DPSK
TFPS MZM for evaluation by large Tier 1 telecom customers;
In the first system for optical signal modulation in all three channels differential binary phase shift keying (DPSK
) was used, in the second--the intensity modulation (IM) and in the third--polarization shift keying were used, while the fourth is a combined transmission system, where for the first channels optical signal modulation NRZ DPSK
was used, for the second channel--NRZ--OOK and third--2--POLSK.
We have invested in the next generation DPSK
module with a focus on reducing the form factor and power consumption for our customers," said Mike Chan, President of Opnext's subsystems business unit and EVP, Business Development & Marketing at Opnext.
Opnext's next generation 40Gbps DPSK
OTCBB:GGOX), a leading supplier of high performance electronic and electro-optic components that enable next generation 40G and 100G optical networks, announced that as part of the ongoing productization of its Thin Film Polymer on Silicon (TFPS[TM]) line of Mach-Zehnder Modulators (MZM), that its LX8401 40G DPSK
MZMs has successfully passed prequalification assessment with over 1000hrs of Telcordia's GR-468 demanding High Temperature Operating Lifetime (HTOL) testing without degradation in operating performance.
OTCBB:GGOX), a leading supplier of high performance electronic and electro-optic components that enable next generation 40G and 100G optical networks, today announced that it will demonstrate its 40G DPSK
Mach-Zehnder Modulator (MZM) and 100G driver at the OFC/NFOEC in Los Angeles, California beginning on March 8, 2011.
One deals with the advanced modulation formats (such as DPSK
, QPSK, and QAM) that are increasingly being used for improving spectral efficiency of WDM lightwave systems.
Launched industry first Thin Film Polymer on Silicon (TFPS[TM]) modulator production samples from the Sanmina-SCI production line with the 40G DPSK