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Optical phase noise measurement device

Licence partner wanted
Especially interesting for
  • precision spectroscopy
  • fibreglass sensors
  • telecommunications

Commercial laser systems now attain linewidths in the range of a few kHz, so that their phase noise is difficult to measure using the self-heterodyne method. For such measurements, PTB's invention generates a reference signal by means of a highly stable optical cavity. Even without an additional reference laser, this allows highly sensitive phase noise measurements in the range from 10 mHz to a few MHz. A patent application has been filed for the laser characterization procedure.


Thomas Legero
Department 4.3 Quantum Optics and Unit of Length
Phone: +49 (0)531 592-4306
Opens window for sending emailthomas.legero(at)ptb.de