US Patent 7805082 Optical laser control for optical communications systems

Patent 7805082 was granted and assigned to Ciena (company) on September, 2010 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Ciena (company)

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

78050820

Patent Inventor Names

James Edward Whiteaway0

Date of Patent

September 28, 2010

Patent Application Number

109462240

Date Filed

September 21, 2004

Patent Primary Examiner

‌

M. R. Sedighian

Patent abstract

An optical communications system comprises a transmitter, a receiver and an optical communications link between the transmitter and receiver. The transmitter comprises a current-driven directly modulated laser for providing a modulated optical signal and a current controller for controlling the current waveform applied to the laser. The current waveform applied to the laser is determined to compensate for the effects of the laser non-linearities and the fiber chromatic dispersion. This system applies pre-compensation to the directly modulated laser input current waveform to provide both pre-compensation for chromatic dispersion and compensation for the non-linearities of the directly modulated laser. These are two of the main limiting factors in providing a low cost high data rate and long reach optical communications system.