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:
Dec. 16, 1997
Filed:
Feb. 14, 1996
Ando Electric Co., Ltd., Tokyo, JP;
Nippon Telegraph And Telephone Corporation, Tokyo, JP;
Abstract
A light pulse generator is disclosed comprising an optical main-loop, a pumped-light source, a delay optical fiber, and an optical switch controller. The optical main-loop circulates a light and includes a light mixer, a light isolator, an erbium-doped optical fiber, an optical switch, a light divider, and an optical fiber coupler. The pumped-light source generates a pumped-light and introduces the pumped-light into the optical main-loop through the light mixer. The terminals of the delay optical fiber are connected to the optical fiber coupler so as to form an optical sub-loop for spreading a pulse width of a light pulse circulating in the optical main-loop. The optical switch controller switches the optical switch to an ON-state. As a result, a positive feedback amplification is carried out in the optical main-loop and an output light pulse having a sufficiently long pulse width and sufficiently high power is picked up from the optical loop through the light divider.