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:
Jun. 18, 1991
Filed:
Mar. 13, 1990
Shoichi Sudo, Atsugi, JP;
Yoshihisa Sakai, Yokohama, JP;
Hiroshi Yasaka, Zama, JP;
Tetsuhiko Ikegami, Tokyo, JP;
Yuzo Yoshikuni, Kawasaki, JP;
Itaru Yokohama, Zama, JP;
Kenichi Kubodera, Isehara, JP;
Nippon Telegraph & Telephone Corporation, Tokyo, JP;
Abstract
A method of stabilizing the frequency of a semiconductor laser comprises stabilizing a time-dependent frequency fluctuation by utilizing an optical energy absorption medium including an isotope acetylene gas molecule. An apparatus for stabilizing the frequency of a semiconductor laser, comprises a semiconductor laser, an optical energy absorption medium, a photodetector and a control circuit as essential elements. The optical energy absorption medium includes an isotope acetylene molecule.