Dispersion compensation in atom interferometry by a Sagnac phase

Dispersion compensation in atom interferometry by a Sagnac phase

Dispersion compensation for atom interferometry.

A new technique for maintaining high contrast in an atom interferometer is used to measure large de Broglie wave phase shifts. Dependence of an interaction induced phase on the atoms' velocity is compensated by applying an engineered counterphase. The counterphase is equivalent to a rotation, is precisely determined by a frequency, and can be used to measure phase shifts due to interactions of ...

Compensation for channel dispersion by nonlinear optical phase conjugation.

Recent theoretically and experimental"5'7-l0 studies indicate that the generation of phase-conjugate replicas of incident optical waves has certain formal aspects of time reversal and that this property can be used to correct for spatial-propagation distortion. In addition, chirp compensation using four-wave mixing has been analyzed."1 In this Letter we explore theoretically what happens follow...

Dispersion and nonlinearity compensation by spectral phase conjugation.

We propose the use of spectral phase conjugation to compensate for dispersion of all orders, self-phase modulation, and self-steepening of an optical pulse in a fiber. Although this method cannot compensate for loss and intrapulse Raman scattering, it is superior to the previously suggested midway temporal phase conjugation method if high-order dispersion is a main source of distortion. The res...

He-McKellar-Wilkens topological phase in atom interferometry.

We report an experimental test of the topological phase predicted by He and McKellar in 1993 and by Wilkens in 1994: this phase, which appears when an electric dipole propagates in a magnetic field, is connected to the Aharonov-Casher effect by electric-magnetic duality. The He-McKellar-Wilkens phase is quite small, at most 27 mrad in our experiment, and this experiment requires the high phase ...