Double Lorentzian atomic prism

Abstract

We present an atomic prism spectrometer that utilizes the steep linear dispersion between two strongly absorbing hyperfine resonances of rubidium. We resolve spectral lines 50 MHz apart and, utilizing a larger part of the available spectrum than only between the two resonances, we spatially separate collinear pump, signal and idler beams resulting from a four-wave mixing process. Due to the high transparency possible between the resonances, these results have applications in the filtering of narrow band entangled photons and interaction free measurements.

Precision frequency measurement on a chip using weak value amplification

“…One way to mitigate this difficulty that was proposed in the context of atomic resonances is to work in the region between two resonances [38,39]. This technique allows high-precision frequency measurements with relatively high optical transmission so as to minimize the FIG.…”

“…One way to mitigate this difficulty that was proposed in the context of atomic resonances is to work in the region between two resonances [38,39]. This technique allows high-precision frequency measurements with relatively high optical transmission so as to minimize the In between the band gaps, there is relatively stable high transmission (∼ 0.99) and low group velocity (∼ 68% of the native group velocity).…”

Noise suppression in inverse weak value-based phase detection

“…Hence, the resolution of a precision frequency measurement can be made large for large σ and for large ∂θ/∂ω, as is the case for an atomic prism [38].…”

“…(achievable in an atomic prism [38]), σ = 1 cm, λ = 780 nm, a laser power of 1 mW and an integration time of 1 second, we have a minimum resolvable frequency shift ∆ω ∼ 1 Hz.…”

Weak-value amplification of the fast-light effect in rubidium vapor

“…The coupling and the signal beams are aligned colinearly to achieve the absorption dip. We use an atomic prism to filter out the coupling beam after the cell [24]. This prism contains isotopically pure 87Rb and is heated to 100 • C to achieve a large dispersion (dn/dλ).…”