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. 24, 1995
Filed:
Mar. 26, 1992
Hironori Takahashi, Shizuoka, JP;
Tsuneyuki Urakami, Shizuoka, JP;
Shinichiro Aoshima, Shizuoka, JP;
Hamamatsu Photonics K.K., Shizuoka, JP;
Abstract
Polarized light pulses are applied to an optical modulator including an electrooptic crystal. A polarization state of the applied light is changed in accordance with a voltage of an electrical signal applied to the optical modulator. A polarization interferometer receives the light output from the optical modulator, and generates an interference fringe on the input surface of a photodetector such as a one-dimensional CCD. A processing device calculates a pitch and a movement distance of the interference fringe, based on an output signal of the photodetector, to determine the voltage. A waveform of the electrical signal is determined by sampling the electrical signal with multiple light pulses, while varying a phase relationship between the electrical signal and the light pulses.