Duo-binary signal encoding

Apparatus for implementing the application of duo-binary signal encoding in high-power, high-speed transmission systems which may be employed to mitigate the problem of stimulated Brillouin scattering. A dual-drive Mach-Zehnder interferometer modulator is used, with data being applied to both modula...

Full description

Saved in:
Bibliographic Details
Main Authors FRANCK THORKILD, HANSEN PER BANG
Format Patent
LanguageEnglish
Published 13.02.2001
Edition7
Subjects
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
BLASTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
JOINTS OR FITTINGS FOR PIPES
LIGHTING
MEANS FOR THERMAL INSULATION IN GENERAL
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
PIPES
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING
THERMAL INSULATION IN GENERAL
TRANSMISSION
TRANSPORTING
WEAPONS
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Online AccessGet full text

Cover

More Information
Summary:Apparatus for implementing the application of duo-binary signal encoding in high-power, high-speed transmission systems which may be employed to mitigate the problem of stimulated Brillouin scattering. A dual-drive Mach-Zehnder interferometer modulator is used, with data being applied to both modulation inputs. The voltage difference between the two modulation inputs is between -Vpi and +Vpi. In one embodiment, the data signal is applied to one input, and the same signal, delayed by one bit, is applied to the second input, and the modulator is biased so as to have minimum throughput when both inputs are identical. In the second embodiment, the data signal is applied to one input and the complementary data-bar signal, delayed one bit, is applied to the second input, with the modulator biased to minimum throughput when both inputs are identical. This novel implementation has been verified experimentally showing a power penalty of less than 1 dB relative to a conventional binary signal. No inherent penalty is expected. Likewise it is demonstrated that significant increases of the SBS will increase the bit rate of duo-binary encoded signals. For example, the SBS threshold at 10 Gb/s is 12.7 dB higher for duo-binary encoding than for conventional binary modulation.
Bibliography:Application Number: US19990321347