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:
May. 13, 2008
Filed:
Jun. 20, 2003
Akira Shirakawa, Choufu-shi, Tokyo 182-0026, JP;
Kenichi Ueda, Choufu-shi, Tokyo 182-0026, JP;
Hirofumi Kan, Hamamatsu, JP;
Hirofumi Miyajima, Hamamatsu, JP;
Akira Shirakawa, Choufu-shi, Tokyo 182-0026, JP;
Kenichi Ueda, Choufu-shi, Tokyo 182-0026, JP;
Hirofumi Kan, Hamamatsu, JP;
Hirofumi Miyajima, Hamamatsu, JP;
Hamamatsu Photonic K.K., Shizuoka, JP;
Other;
Abstract
Fiber laser unitcomprises a plurality of fiber lasersandthat generate laser beams by exciting a laser active substance inside coresandby exciting light, propagate the laser beams inside the coresand, and output the laser beams from the end portionsand, wherein the respective fiber lasersandhave resonatorsandthat reflect the laser beams on both ends, andthereof and have a structure in which a part of the coresandis reduced in diameter, the diameter reduced portions of the coresandare made proximal to each other, injection synchronization is carried out inside the resonatorsandby laser beams leaked from the coresand, and a loss is applied to the port of either one of the fiber lasersand. According to this fiber laser unit, by a simple structure in which the coresandare made proximal to each other and injection synchronization is carried out by using laser beams leaked from the coresand, coherent addition of lasers with extremely high addition efficiency is realized.