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:
Sep. 21, 2010
Filed:
Aug. 22, 2007
Hidemi Tsuchida, Tsukuba, JP;
Hiroshi Ishikawa, Tsukuba, JP;
Takashi Shimoyama, Tsukuba, JP;
Abedin Kazi Sarwar, Koganei, JP;
Tetsuya Miyazaki, Koganei, JP;
Hidemi Tsuchida, Tsukuba, JP;
Hiroshi Ishikawa, Tsukuba, JP;
Takashi Shimoyama, Tsukuba, JP;
Abedin Kazi Sarwar, Koganei, JP;
Tetsuya Miyazaki, Koganei, JP;
Abstract
An optical phase modulation circuit includes an optical phase modulation element, an optical bandpass filter, and an optical directional coupler, wherein control light with a wavelength of λis coupled with probe light with a wavelength of λusing the optical directional coupler and input to the optical phase modulation element, the probe light that has been phase modulated by the optical phase modulation element is extracted through the optical band pass filter, and the phase of the probe light is modulated in response to the intensity of the control light.