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:
Mar. 01, 2011
Filed:
Apr. 13, 2009
Kazunori Shiota, Tokyo, JP;
Shin Masuda, Tokyo, JP;
Masataka Nakazawa, Miyagi, JP;
Masato Yoshida, Miyagi, JP;
Kazunori Shiota, Tokyo, JP;
Shin Masuda, Tokyo, JP;
Masataka Nakazawa, Miyagi, JP;
Masato Yoshida, Miyagi, JP;
Advantest Corporation, Tokyo, JP;
National University Corporation Tohoku University, Miyagi, JP;
Abstract
A laser oscillator includes a ring resonator. The ring resonator includes an optical circulator having first, second, third, and fourth ports and a first optical amplification fiber connected to the optical circulator. Light incident on the first port is exited from the second port, and light incident on the second port is exited from the third port. The fourth port provides an exciting light and injects the exciting light into the ring resonator through the first port. The first optical amplification fiber amplifies light exited from the third port with the exciting light provided by the fourth port. The laser oscillator also includes an optical member connected to the optical circulator. The optical member reflects at least a part of the light exited from the second port and injects the same into the second port again.