Method for Determining the Frequency Response of an Electro-optical Component
Patent 03018/TUB

This Invention includes an enhanced method for analyzing frequencies of optical Signals and applies in the electro optics.

  1. Frequency response of the system can be measured by autocorrelation
  2. No complex calibration of the measuring system is necessary
Possible Applications



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

Optical pulses with a pulse frequency are generated. 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.

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Ina Krüger

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Technology Readiness Level

Small scale prototype

Property Rights

approved: US, DE

Patent Holder

Technische Universität Berlin

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