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:
Dec. 29, 1998
Filed:
Mar. 04, 1993
Sten Helmfrid, Musashino, JP;
Kenchi Ito, Kokubunji, JP;
Kimio Tatsuno, Tokyo, JP;
Kazumi Kawamoto, Kokubunji, JP;
Tetsuo Andou, Kokubunji, JP;
Hiroshi Momiji, Kokubunji, JP;
Osamu Komoda, Kokubunji, JP;
Hisao Kurosawa, Fukaya, JP;
Masayoshi Sato, Fukaya, JP;
Fumio Nitanda, Fukaya, JP;
Kohei Ito, Fukaya, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
There is disclosed a harmonic modulation device of waveguide type including a semiconductor laser, a waveguide for generating a nonlinear optical harmonic of the semiconductor laser by keeping phase matching, means for leading an optical beam of the semiconductor laser to the waveguide, electrodes disposed on the waveguide, and means for modulating a refractive index of the waveguide electro-optically to modulate a phase matching condition and thereby modulate an intensity of the harmonic.