Patents by Inventor Gunter Toesko

Gunter Toesko 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 of reducing amplitude noise of solid lasers with resonator-internal frequency doubling, and an arrangement for carrying out this method
    Patent number: 6125130
    Abstract: The invention concerns a method of reducing the amplitude noise of solid lasers (e.g. Nd-YAG, Nd:YAlO, Nd:YLF, Nd:YVO.sub.3, etc.) with resonator-internal frequency doubling (for example by KTP, LBO, BBO, KNbO3, LiNbO.sub.3, etc.). According to the invention, some of the frequency-doubled ejected laser radiation or the fundamental wave radiation is guided onto a photodetector (in particular a photodiode) whose electrical output signal undergoes bandpass filtering which filters out a frequency range typical of the noise. This output signal, optionally after rectification, quadrature and/or integration, is then subjected to temperature regulation or control which corrects the temperature of the frequency-doubling crystal such that the output signal is minimized after the bandpass filter and thus the amplitude noise of the laser radiation is minimized.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: September 26, 2000
    Inventors: Nikolaus Schmitt, Gunter Toesko, Josef Schalk, Susanne Nikolov