Sum-frequency generation as an ultrafast quantum detector for Heisenberg scaled phase measurement

Rajiv Mistry, Jonathan Ortega

Avi Pe’er

We describe ultrafast detection of quantum correlations using broadband sum-frequency generation as a physical two-mode detector. We apply the detection scheme to measurement of broadband squeezing and to phase estimation at the Heisenber limit.

Vladimir B. Braginsky, F. Ya. Khalili

Siegfried Janz, Edward Frlan, Hongxing Dai +2 more

We demonstrate a novel optical phase detector that uses sum-frequency mixing in a nonlinear waveguide. By monitoring the near-field pattern of the sum-frequency light radiated from the waveguide surface, the relative phase of two input light beams can be measured. By using an Al(x)Ga(1-x)As waveguide optimized for sum-frequency generation with lambda = 1.06 microm input light, we demonstrate a simple phase detector capable of resolving phase shifts of less than 0.2 rad. This phase detector is also used in an interferometer configuration as a gigahertz-resolution frequency monitor.

Rafi Z. Vered, M. Rosenbluh, Avi Pe’er

We experimentally demonstrate the precise time energy correlation of light generated by ultrabroad four waves mixing in a photonic crystal fiber. Ultra broadband sum frequency generation serves as an ultrafast detector of both the time and frequency correlation.

Sunao Kurimura, Yuta Kochi, Junko Ishi‐Hayase