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:
Oct. 10, 2000
Filed:
May. 06, 1998
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The SHG laser stabilizing control device of this invention has: an SHG laser having a semiconductor laser having a wavelength which changes in a step-wise manner in response to a change in a wavelength-changeable current and a wavelength conversion element which converts the wavelength of output light of the semiconductor laser into a shorter wavelength; an optical detection section for detecting a step-wise change in the wavelength of output light of the SHG laser; a current changing section which changes the wavelength-changeable current supplied to the semiconductor laser in order to change the wavelength of the semiconductor laser; and a wavelength-changeable current control section which obtains a gap current value of the wavelength-changeable current at which the step-wise change in the wavelength is detected by the optical detection section and adds or subtracts a predetermined current value to or from the gap current value to set a wavelength-changeable current value.