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:
Nov. 18, 2003
Filed:
Apr. 11, 2000
Applicant:
Inventors:
Ken Itoh, Yamato, JP;
Hideaki Okano, Yokohama, JP;
Kiyoyuki Kawai, Yokohama, JP;
Ritsuo Yoshida, Zushi, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/091 ;
U.S. Cl.
CPC ...
H01S 3/091 ;
Abstract
An up-conversion laser unit in which a semiconductor laser of high output power can be used as a pump light source and the wavelength of up-converted laser light is suitable for display. The light of infrared wavelength is generated by the pump light source, the generated light being inputted into a Pr up-conversion laser to up-convert there into red light by Pr ion. The up-converted red light is inputted into, as a pump light source, a Tm up-conversion laser, there being up-converted into blue light by the Tm ion. Thereby, efficient up-conversion into blue light is made possible.