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:
Aug. 10, 2004
Filed:
Feb. 25, 2002
Fumio Akikuni, Tokyo, JP;
Shoichi Aoki, Tokyo, JP;
Tetsuo Yano, Tokyo, JP;
Tohru Mori, Tokyo, JP;
Kazumasa Takada, Tokyo, JP;
Other;
Abstract
A photocoupler splits the light from a low-coherence light source into measuring light DL and local oscillator light KL. A photocoupler receives measuring light DL arid is input to an optical circuit to be measured. The photocoupler splits the reflected light RL. A polarization controller controls the state of polarization of the reflected light RL as split by the photocoupler . A photocoupler allows local oscillator light KL to be incident on a reflector mirror and splits local oscillator light KL. A photocoupler combines the reflected light RL as controlled in the state of polarization by the polarization controller , with the local oscillator light KL.