Octave-spanning Dispersion Compensation for Ultra Broadband Bi-photons Using a Prism Pair with a Negative Separation
Yaakov Shaked, Shai Yefet, Tzahi Geller, Avi Pe’er · arXiv (Cornell University) · 2014
We demonstrate low-loss broadband tuned compensation of both the 2nd and 4th order dispersion of ultra-broad bi-photons, using a prism-pair with negative separation. The corrected spectral phase ($<\pi/20$) of the bi-photons spans nearly an octave in frequency ($\approx1330-2600$ nm), as measured directly by a non-classical bi-photon interference effect. Due to the ultra-broad bandwidth, an ultra-high flux of bi-photons is available for quantum information experiments with extremely pronounced quantum correlations in both time and phase. Most experiments that explore these correlations require transform limited bi-photons, which are now achievable most efficiently with the prism-pair configuration.