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. 13, 2004
Filed:
Feb. 20, 2003
Jong-Ryeol Kim, Suwon-shi, KR;
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
The present invention provides a wavelength-tunable laser apparatus which is capable of obtaining a high output while suppressing the generation of spontaneous emission, as well as having a broad wavelength-tunable range. In particular, the apparatus includes a distributed reflector section which comprises a first active layer for oscillating light, a first grating for filtering the light generated in the first active layer, and upper and lower clad layers between which the first active layer and the first grating are interposed; a gain section which is formed adjoining to a side of the distributed reflector section and comprises a second active layer disposed between the upper and lower clad layers for adjusting the gain of the light; and a gain-clamped semiconductor optical amplifier section formed adjoining to a side of the gain section, wherein the gain-clamped semiconductor optical amplifier section comprises a third active layer disposed between the upper and lower clad layers for amplifying the light to have a clamped gain and a second grating for filtering the light passing through the third active layer.