Simplified photonic approach for high-coding-efficiency, digitalized microwave frequency measurement using multiple optical filter arrays with different FSRs

Bing Lu; Wei Pan; Xihua Zou; Peixuan Li; Xinkai Liu; Lianshan Yan; Bin Luo

doi:10.1117/12.2071691

13 November 2014 Simplified photonic approach for high-coding-efficiency, digitalized microwave frequency measurement using multiple optical filter arrays with different FSRs

Bing Lu, Wei Pan, Xihua Zou, Peixuan Li, Xinkai Liu, Lianshan Yan, Bin Luo

Author Affiliations +

Proceedings Volume 9279, Real-time Photonic Measurements, Data Management, and Processing; 92790M (2014) https://doi.org/10.1117/12.2071691
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

A simplified photonic approach to microwave frequency measurement with digital outputs based on multiple parallel optical filter arrays, is proposed and experimentally demonstrated. In the proposed approach, multiple optical phase-shifted filter arrays in parallel with different free spectral ranges (FSRs) are designed to obtain digitalized results in the form of binary code with high-coding efficiency and fine measurement resolution. In particular, compared with previous approaches, larger tolerances on the phase shifts of optical filter arrays are provided in the proposed approach having the same coding efficiency and resolution. Therefore, the proposed system is greatly simplified and robust to noise. A proof-of-concept experiment is performed when two optical filter arrays are used. 8-bit binary digitalized results with a 5-bit effective number and a 2-GHz measurement resolution are obtained in the range from 10 to 40GHz.

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Bing Lu, Wei Pan, Xihua Zou, Peixuan Li, Xinkai Liu, Lianshan Yan, and Bin Luo "Simplified photonic approach for high-coding-efficiency, digitalized microwave frequency measurement using multiple optical filter arrays with different FSRs", Proc. SPIE 9279, Real-time Photonic Measurements, Data Management, and Processing, 92790M (13 November 2014); https://doi.org/10.1117/12.2071691

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KEYWORDS

Optical filters

Microwave radiation

Optical arrays

Digital filtering

Phase shifts

Filtering (signal processing)

Microwave photonics

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