摘要 |
The invention concerns a method of reducing the amplitude noise of solid lasers (e.g. Nd-YAG, Nd:YA1O, Nd:YLF, Nd:YVO3, etc.) with resonator-internal frequency doubling (for example by KTP, LBO, BBO, KNbO3, LiNbO3, 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.
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申请人 |
DAIMLER-BENZ AKTIENGESELLSCHAFT, 70567 STUTTGART, DE |
发明人 |
SCHMITT, NIKOLAUS, DIPL.-PHYS. DR., 80797 MUENCHEN, DE;TOESKO, GUENTER, DIPL.-PHYS., 96317 KRONACH, DE;SCHALK, JOSEF, DIPL.-ING., 84051 ESSENBACH, DE;NIKOLOV, SUSANNE, DIPL.-ING., 81247 MUENCHEN, DE |