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:
Jan. 21, 1997
Filed:
Feb. 12, 1996
Masaaki Furuhashi, Tokyo, JP;
Ryouji Handa, Tokyo, JP;
Nobuo Tomita, Higashiibaraki-gun, JP;
Yoshitaka Enomoto, Mito, JP;
Ando Electric Co., Ltd., Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A light pulse generator is disclosed comprising an optical loop, a pumped-light source, and an optical switch controller. The optical loop includes a light mixer, a light isolator, an erbium-doped optical fiber, a light valve means, and a light divider. The pumped-light source generates a pumped-light and introduces the pumped-light into the optical loop through the light mixer. The optical switch controller progressively turns the optical switch to an ON-state using a control signal having a gentle positive slope so that the amount of a light outputted through the optical switch is gently increased in accordance with the gentle slope of the control signal. The length of time of the positive slope of the control signal equals the time which is required for circulating a light pulse through the optical loop through one cycle. A circulation of a light pulse is carried out in the optical loop while the optical switch is in the ON-state and the light pulse having a gentle slope is picked up from the optical loop through the light divider.