Patents by Inventor Hans-Joachim Heyke

Hans-Joachim Heyke has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for regulating the output power of a semiconductor laser
    Patent number: 4181901
    Abstract: Arrangement for regulating the output power of a semiconductor laser for a data transmission system including a light conductive fiber through which the laser power is transmitted and a photodiode which is responsive to light energy produced by the laser and whose output signal is utilized, possibly after appropriate amplification, to regulate the laser current. The photodiode is a thin-film photodiode which is transparent for the light frequencies to be transmitted via the light conductive fiber and is inserted in the light-conductive fiber used to transmit the signals.
    Type: Grant
    Filed: November 17, 1977
    Date of Patent: January 1, 1980
    Assignee: Licentia Patent-Verwaltungs-G.m.b.H.
    Inventor: Hans-Joachim Heyke