Wideband DFS Measurement Using a Low-Frequency Reference Signal

Chongjia Huang, Erwin H.W. Chan, Chirappanath B. Albert

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A novel Doppler frequency shift (DFS) measurement system based on a cascaded modulator topology is presented. It is capable to measure both the object speed and moving direction on an electrical spectrum analyzer with the use of a fixed low-frequency reference signal. It has a simple single-laser and single-photodetector structure, a robust performance and a wide operating frequency range, which is only limited by the optical modulator bandwidth. Experimental results are presented that demonstrate DFS ranging from -100 kHz to +100 kHz with an error of less than ±0.1 Hz at different microwave signal frequencies. Over 35 dB suppression in unwanted frequency components present at the system output is also demonstrated.

Original languageEnglish
Article number8836666
Pages (from-to)1643-1646
Number of pages4
JournalIEEE Photonics Technology Letters
Volume31
Issue number20
DOIs
Publication statusPublished - 15 Oct 2019

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Spectrum analyzers
Light modulators
Photodetectors
Modulators
frequency shift
modulators
Microwaves
Topology
low frequencies
broadband
Bandwidth
Lasers
photometers
analyzers
topology
frequency ranges
retarding
bandwidth
microwaves
output

Cite this

Huang, Chongjia ; Chan, Erwin H.W. ; Albert, Chirappanath B. / Wideband DFS Measurement Using a Low-Frequency Reference Signal. In: IEEE Photonics Technology Letters. 2019 ; Vol. 31, No. 20. pp. 1643-1646.
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Wideband DFS Measurement Using a Low-Frequency Reference Signal. / Huang, Chongjia; Chan, Erwin H.W.; Albert, Chirappanath B.

In: IEEE Photonics Technology Letters, Vol. 31, No. 20, 8836666, 15.10.2019, p. 1643-1646.

Research output: Contribution to journalArticleResearchpeer-review

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