Erecting time telescope for photonic quantum networks
arXiv:2307.09493 · doi:10.1364/OE.501609
Abstract
A time lens allows one to stretch or compress optical waveforms in time, similar to the conventional lens in space. However, a single-time-lens imaging system always imparts a residual temporal chirp on the image, which may be detrimental for quantum networks, where the temporal image interacts with other fields. We show that a two-time-lens imaging system satisfying the telescopic condition, a time telescope, is necessary and sufficient for creating a chirpless image. We develop a general theory of a time telescope, find the conditions for loss minimization, and show how an erecting time telescope creating a real image of a temporal object can be constructed. We consider several applications of such a telescope to making indistinguishable the photons generated by spontaneous parametric downconversion or single emitters such as quantum dots.
arXiv comment17 pages, 8 figures
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Cited by in corpus (4)
- Ultrafast electro-optic Time-Frequency Fractional Fourier Imaging at the Single-Photon Level
- Interferometric sorting of temporal Hermite-Gauss modes via temporal Gouy phase
- Few-mode squeezing in type-I parametric downconversion by complete group velocity matching
- Time-resolved second-order autocorrelation function of parametric downconversion