The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 06, 2001
Filed:
Jun. 30, 1998
Doren W. Hess, Jr., Norcross, GA (US);
Rezin E. Pidgeon, Jr., Atlanta, GA (US);
Scientific-Atlanta, Inc., Norcross, GA (US);
Abstract
An optical transmitter (,) includes a distributed feedback semiconductor laser (,) operated in a linear regime below a threshold associated with stimulated Brillouin scattering to generate an optical signal. A resistor (,) or other heater is physically coupled to the semiconductor laser (,), and a modulated current source (,) drives the resistor (,) with a triangle waveform (,), thereby varying an optical wavelength of the optical signal such that the optical signal and a double Rayleigh backscattered signal are characterized, at the optical receiver (,), by different optical frequencies. As a result, interference generated by Rayleigh backscattering is minimized at the optical receiver (,).