啁啾脉冲外差技术用于在频率梳和连续波激光器之间实现最佳拍频检测。

Chirped pulse heterodyne for optimal beat note detection between a frequency comb and a continuous wave laser.

作者信息

Deschênes Jean-Daniel, Genest Jérôme

出版信息

Opt Express. 2015 Apr 6;23(7):9295-312. doi: 10.1364/OE.23.009295.

DOI:10.1364/OE.23.009295

Abstract

Chirped pulse heterodyne is proposed to maximize the signal-to-noise ratio (SNR) when measuring the beat note between an optical frequency comb and a continuous wave (CW) laser. The noise model reveals that all the comb power within the largest possible detection bandwidth can be used to increase the SNR. The chirped comb/CW interference experiment is shown to be equivalent to CW/CW interference, using the comb's spectrally available power. The approach can also greatly alleviate dynamic range issues when detected pulsed heterodyne signals. A beat note SNR of 68.3 dB in a 100 kHz bandwidth is achieved.

摘要

提出了啁啾脉冲外差技术，以便在测量光频梳与连续波（CW）激光器之间的拍频时最大化信噪比（SNR）。噪声模型表明，最大可能检测带宽内的所有梳状功率都可用于提高信噪比。啁啾梳状波/CW干涉实验表明，利用梳状波的频谱可用功率，该实验等同于CW/CW干涉。当检测脉冲外差信号时，该方法还可大大缓解动态范围问题。在100 kHz带宽内实现了68.3 dB的拍频信噪比。