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. 08, 2005
Filed:
May. 30, 2003
Taek Kim, Seoul, KR;
Taek Kim, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
A wavelength tunable VCSEL is provided. The wavelength tunable VCSEL includes a current constricting layer which is formed on a lower distributed Bragg reflector, upper and lower electrodes for laser oscillation, and additional electrodes which are formed on a predetermined region of an upper distributed Bragg reflector from which light is emitted so as to vary a width of an effective resonance region. Compared to an existing VCSEL, the wavelength tunable VCSEL can rapidly change a wavelength of emitted light and prevent the deterioration of gain characteristics of laser oscillation due to variations in the width of the effective resonance region according to variations in a temperature. As a result, a wavelength tunable region of emitted laser can be increased.