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. 02, 2007
Filed:
Feb. 26, 2003
Hikaru Kouta, Tokyo, JP;
Yoshikazu Suzuki, Tokyo, JP;
Shuetsu Kudo, Tokyo, JP;
Masaki Tsunekane, Tokyo, JP;
Katsuji Mukaihara, Tokyo, JP;
Takagimi Yanagitani, Osaka, JP;
Hideki Yagi, Osaka, JP;
Hikaru Kouta, Tokyo, JP;
Yoshikazu Suzuki, Tokyo, JP;
Shuetsu Kudo, Tokyo, JP;
Masaki Tsunekane, Tokyo, JP;
Katsuji Mukaihara, Tokyo, JP;
Takagimi Yanagitani, Osaka, JP;
Hideki Yagi, Osaka, JP;
NEC Corporation, Tokyo, JP;
Konoshima Chemical Co., Ltd., Osaka, JP;
Abstract
As a composite laser rod capable of satisfying the positional stability and output stability of a laser beam, a laser rod in which a laser active element is doped is intimately inserted into a hollow portion of a non-doped ceramic pipe that has a crystal structure the same as the laser rod followed by baking so as to remove a gap and strain at an interface between the laser rod and the ceramic pipe after the baking further followed by polishing a surface of the ceramic pipe to form a ceramic skin layer, and thereby a composite laser rod is formed. In the composite laser rod, an influence due to fluctuation in the cooling capacity of cooling water or a heat sink is averaged by a non-doped skin layer, temperature fluctuation of the laser rod is suppressed, and an influence of vibration from the cooling water or a cooling fan can be suppressed. When the refractive index of the laser rod is made higher than that of the ceramic pipe, a high efficiency oscillation can be realized, and furthermore when the thermal conductivity of the ceramic pipe is made higher than that of the laser rod, the thermal lens effect can be alleviated.