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:
Nov. 22, 1994
Filed:
Mar. 26, 1993
Bernard Glance, Colts Neck, NJ (US);
Robert W Wilson, Holmdel, NJ (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A variable optical delay line which can delay an optical signal by a selected interval of time comprises an input wavelength router connected to an output wavelength router by means of optical waveguides of different lengths. A wavelength shifter coupled to the input of the input wavelength router shifts the wavelength of the received signal to a desired wavelength. Depending on the wavelength of the signal from the wavelength shifter, the received signal is directed to a specific one of the waveguides of different lengths to provide a delay which is controllable. The output wavelength router directs the optical signals from the various waveguides of different lengths to a common output waveguide.