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. 28, 2003
Filed:
Mar. 16, 2000
Tohru Mori, Tokyo, JP;
Seiji Funakawa, Tokyo, JP;
Ando Electric Co., Ltd., Tokyo, JP;
Abstract
In order to start sweeping an optical spectrum analyzer and a wavelength tunable light source on the same timing, a motor for driving a spectroscope in the optical spectrum analyzer is controlled. To this end, a drive circuit outputs a control signal to determine the timing where the motor starts to rotate. A wavelength control circuit in the wavelength tunable light source controls the sweep of the wavelength of single-mode oscillation from a light source unit and starts sweeping the light source unit in response to a signal externally supplied to control the timing of sweep start. As a result, the sweep of the wavelength being measured with the optical spectrum analyzer and that of the wavelength of single-mode oscillation from the wavelength tunable light source are started on the same timing and high-speed sweep is achieved.