文章分析了基于平衡零拍的时间测量的相位问题,给出了以压缩态作为信号场时的量子标准极限,并重点讨论了在实际测量中由于系统不稳定而导致信号场与本底场的相对位相抖动对测量结果的影响。结果表明,利用压缩光的平衡零拍测量,最佳测量结果的压缩度取决于测量系统的相位稳定性。

This paper proceeds as follow. To theoretically analyze the influence of phase fluctuations on time measurement based on homodyne detection. It is discussed then that the result is different as the system changes. Beyond Standard Quantum Limit (SQL) with non-classical light source in measurement. The measurement is still very sensitive to the relative phase fluctuations between signal and local beam, especially in the case of large squeezing. The best squeezing depends on the relative phase fluctuation.