Instantaneous frequency measuring device based on optical power monitoring

Abstract

The invention discloses an instantaneous frequency measuring device based on optical power monitoring, and relates to the field of optoelectronic devices and microwave photonics. The device comprises a continuous wave laser (1), a polarization controller (2), a signal generator (3), an electric power divider (4), an electric delay line (5), an optical power divider (6), an electric power divider (7), an electric power divider (8), an I / Q modulator (9), an I / Q modulator (10), an optical power meter (11) and an optical power meter (12). By monitoring the power values of the two optical power meters, the frequency of the radio frequency signal can be calculated. By changing the delay amount of the electric delay line (5), the measurement range and measurement error of the instantaneous frequency measurement can be adjusted.

Description

technical field [0001] The invention relates to an instantaneous frequency measurement device based on optical power monitoring, and relates to the fields of optoelectronic devices and microwave photonics. Background technique [0002] Instantaneous frequency measurement is an important research direction in the field of microwave photonics. It has many important applications in military and civilian fields, such as radar, communication systems, electronic warfare systems and other fields. In recent years, researchers have proposed many methods to realize instantaneous frequency measurement. Roughly divided into the following methods: frequency-space mapping method, frequency-time mapping method, frequency-phase mapping method, frequency-power mapping method. The method that researchers use more often is the method of frequency-power mapping. The received radio frequency signal is modulated by the modulator, and the modulated signal is divided into two paths and processed ...

AI Technical Summary

Problems solved by technology

However, the structure and principle of these schemes are still relatively complicated, and the related polarization devices are easily affected by environmental disturbances.

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