Method for Determining a Frequency Response

03018/TUB: Method for Determining a Frequency Response



Currently the frequency analysis of optical signals relies on electro-optical modulators generating variable frequency signals. Subsequently, the response of a component to the signal can be detected and analyzed. Therefore, a complex calibration of the system is necessary.  Additionally, the frequency range is confined to the range of the electro-optical modulator.

Technical Description

The invention described here provides a method for determining the frequency response of an electro-optical component, particularly the response of a light-generating or light-modulating component.

The electro-optical component is controlled by an electrical measuring signal with a measuring frequency in such a manner that an optical output signal is formed that is modulated by the measuring frequency. The measuring frequency is equal to an integral multiple of the pulse frequency plus a predetermined frequency offset. The pulses and the output signal are mixed, and a mixed product is detected whose modulation frequency corresponds to the predetermined frequency offset. The mixed product indicates the frequency response of the electro-optical component at the measuring frequency.

Anwendungsmöglichkeiten / Possible applications:


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Show all techoffers Vorteile / Benefits:
  • Frequency response of the system can measured easily by autocorrelation
  • No complex calibration of the measuring system is necessary
Entwicklungsstand / Development status:

Lab level

Reifegrad / Maturity level:


Schlagworte / Tags:
electro optics, Frequency response, light-modulating, optical pulse
Schutzrechte / Property rights:

DE, US - granted

Patentinhaber / Patent holder:

Technische Universität Berlin

Möglichkeiten der Zusammenarbeit / Possible cooperation:
  • R&D Cooperation
  • Patent Purchase
  • Licensing

Ansprechpartnerin / Contact Person:
Ina Krüger

Tel.: 030 314-75916
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