Dispersion cancellation and high-resolution time measurements in a fourth-order optical interferometer.
Dispersion cancellation and high-resolution time measurements in a fourth-order optical interferometer.
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DOI：
10.1103/physreva.45.6659
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发表时间：
1992-05
期刊：
影响因子：
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通讯作者：
Aephraim M. Steinberg;P. Kwiat;R. Chiao
中科院分区：
文献类型：
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作者：
Aephraim M. Steinberg;P. Kwiat;R. Chiao
在测量短光脉冲通过介电介质的传播时间时，群速度色散 (GVD) 对分辨率产生了根本性的限制。我们证明，由于非局域量子力学效应，四阶干涉中可能会发生令人惊讶的抵消，从而可以测量自发参量下转换中发射的光子之间的时间间隔，而不会因单个光子波包的扩散而导致分辨率显着下降。这对于测量 GVD 的高阶贡献也可能有用
Group-velocity dispersion (GVD) places a fundamental limitation on the resolution possible when measuring the propagation time of short optical pulses through dielectric media. We show that due to a nonlocal, quantum-mechanical effect, a surprising cancellation can occur in fourth-order interference, allowing the time interval between photons emitted in spontaneous parametric down-conversion to be measured without significant degradation of the resolution due to the spreading of the individual photon wave packets. This may also prove useful for measuring the higher-order contributions to GVD