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Full-scale phase demodulation approach for photonic instantaneous frequency measurement

机译：用于光子瞬时频率测量的满量程相位解调方法

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摘要

A full-scale phase demodulation approach based on two quadrature power ratios is proposed to perform photonicninstantaneous frequencymeasurement (P-IFM). In the proposed approach, a delay-line interferometer (DLI) and twonlaser sources are used. The wavelengths of two lasers are located at the peak point of and at the −3 dB point of thencomb filtering response of the DLI. Therefore, at the two wavelengths, a cosine-shape and a sine-shape filteringnresponse are formed to process the þ1st or −1st order sidebands, which are generated by externally modulatingnthe light waves of the two lasers with a microwave signal. After being filtered, two quadrature power ratios,ncosine-shaped and sine-shaped responses, are obtained at the two wavelengths via power detection and power com-nparison. The phase term induced by the frequency is then demodulated from the two power ratios withoutnambiguity within the full-scale range of 0–2π, the so-called full-scale phase demodulation, which has been verifiednin a proof-of-concept experiment. Unlike a half-scale range of 0–π, such a full-scale range of the proposed approachnmakes it a potential solution to design parallel or cascaded configurations to P-IFM to enhance the measurementnrange and the resolution. © 2010 Optical Society of America
机译：提出了一种基于两个正交功率比的满量程相位解调方法来进行光子瞬时频率测量（P-IFM）。在提出的方法中，使用了延迟线干涉仪（DLI）和双激光源。两个激光的波长位于DLI梳状滤波响应的峰值点和-3 dB点处。因此，在两个波长处，形成一个余弦形状和一个正弦形状的滤波响应，以处理第1阶或第-1阶边带，这是通过用微波信号从外部调制两个激光器的光波而产生的。滤波后，通过功率检测和功率比较，在两个波长处获得了两个正交功率比，即余弦形和正弦形响应。然后，在0–2π的满量程范围内从两个功率比无歧义地解调由频率引起的相位项，即所谓的满量程相位解调，这已在概念验证实验中得到了验证。与0-π的半量程范围不同，所提方法的这种满量程范围使其成为设计P-IFM并行或级联配置以增强测量范围和分辨率的潜在解决方案。 ©2010美国眼镜学会

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  • 来源
    《Optics Letters》 |2010年第16期|p.2747-2749|共3页
  • 作者

    Xihua Zou* Wei Pan Bin Luo and Lianshan Yan;

  • 作者单位

    Center for Information Photonics and Communications, School of Information Scienceand Technology, Southwest Jiaotong University, Chengdu 610031, China;

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