Wideband DFS Measurement Using a Low-Frequency Reference Signal

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

doi:10.1109/LPT.2019.2941216

Wideband DFS Measurement Using a Low-Frequency Reference Signal

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

Higher Degree by Research (HDR) Cohort

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

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 language	English
Article number	8836666
Pages (from-to)	1643-1646
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	31
Issue number	20
DOIs	https://doi.org/10.1109/LPT.2019.2941216
Publication status	Published - 15 Oct 2019

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10.1109/LPT.2019.2941216

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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.",

keywords = "Doppler frequency, Doppler velocity, microwave photonic signal processing, microwave photonics",

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AU - Albert, Chirappanath B.

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Y1 - 2019/10/15

N2 - 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.

AB - 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.

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KW - Doppler velocity

KW - microwave photonic signal processing

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Wideband DFS Measurement Using a Low-Frequency Reference Signal

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