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arXiv · 1403.2193

Octave-Spanning Phase Control for Single-Cycle Bi-Photons

Yaakov Shaked·Shai Yefet·Tzahi Geller·Avi Pe'er
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Abstract

The quantum correlation of octave-spanning time-energy entangled bi-photons can be as short as a single optical cycle. Many experiments designed to explore and exploit this correlation require a uniform spectral phase (transform-limited) with very low loss. So far, transform-limited single-cycle bi-photons were not demonstrated, primarily due to lack of precision control of the spectral phase. Here, we demonstrate precise correction of the spectral-phase of near-octave bi-photons to less than ($<\pi/20$) (residual phase) over nearly a full octave in frequency ($\approx1330-2600$ nm). Using a prism-pair with an effectively-negative separation, we obtain tuned, very low-loss compensation of both the 2nd and 4th dispersion orders. We verify the bi-photons spectral phase directly, using a non-classical bi-photon interference effect.

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Yaakov Shaked, Shai Yefet, Tzahi Geller, Avi Pe'er. 2014-03-10. Octave-Spanning Phase Control for Single-Cycle Bi-Photons. https://doi.org/10.1088/1367-2630/17/7/073024

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