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:
Apr. 07, 2015
Filed:
Feb. 21, 2011
Masaaki Sudo, Chiyoda-ku, JP;
Masahito Mure, Chiyoda-ku, JP;
Masaaki Sudo, Chiyoda-ku, JP;
Masahito Mure, Chiyoda-ku, JP;
Sumitomo Osaka Cement Co., Ltd., Chiyoda-ku, Tokyo, JP;
Abstract
The optical frequency comb generating device having two optical modulation partsandindependently modulating optical waves propagating in two branch waveguides and a phase regulatorcontrolling a phase difference between the optical waves includes amplitude adjusting meansfor adjusting a voltage amplitude of the RF signal supplied to at least one of the optical modulation parts, monitoring meansfor monitoring the intensity Pof the output light beam, and a bias control circuitthat controls the amplitude adjusting means to change a difference in voltage amplitude between the RF signals supplied to each optical modulation part, that detects a variation of the output light beam corresponding to the variation of the difference in voltage amplitude from the output signal of the monitoring means, and that controls the phase regulator on the basis of the detection result to adjust the phase difference.