提出利用啁啾脉冲干涉仪进行高精度空间定位的新方案，该方案利用2个具有强的经典频率关联的正负啁啾脉冲，入射到分束器后经和频晶体产生和频干涉信号，通过探测所得干涉信号精确确定经过不同路径的2个光信号的相对延迟时间，从而精确确定目标位置，实现高精度定位，理论上可以达到微米量级的定位精度。研究正负啁啾脉冲不完全对称即正负啁啾系数大小的差异对定位结果的影响。结果表明：正负啁啾系数大小的差异对定位结果影响很小，定位结果对这种差异有很强的容忍度。该方案除具有量子定位中HOM(Hong-Ou-Mandel)干涉仪的所有优点外，还具有装置简单,抑制损耗等优点。

A new scheme is presented for high precision positioning based on chirped-pulse interferometry(CPI). In this scheme, a pair of oppositely chirped optical pulses with strong classical frequency correlations are combined at a beamsplitter. The output beams with two different paths are recombined and focused onto a nonlinear crystal. High precision positioning with magnitude of micron is obtained theoretically by detecting sum frequency interference signal as a function of relative delay between two different paths.The impact of difference between chirp and anti-chirp pulse on positioning is studied. It is shown that positioning has a high tolerance of difference between chirp and anti-chirp parameter. Our scheme exhibits all the advantages of quantum spatial positioning based on the Hong-Ou-Mandel(HOM) quantum interference, but with more simple experimental setup ,robustness against loss and greater signals, which provide more improvements in practical maneuverability.