Rotational Doppler shift of the phase-conjugated photon

Details Rotational Doppler shift of the phase-conjugated photon Rotational Doppler shift of the phase-conjugated photon

2011-04-08

arxiv.org/abs/1104.1529v7

Journ.Opt.Soc.Am. v.29, (2012)

Physics

Quantum Physics

6 pages, 3 figures, submitted to referred journal

Scientific paper

The rotational Doppler shift of a photon with orbital angular momentum $\pm \ell \hbar$ is shown to be an even multiple of the angular frequency $\Omega$ of the reference frame rotation when photon is reflected from the phase-conjugating mirror. We consider the one-arm phase-conjugating interferometer which contains $N$ Dove prisms or other angular momentum altering elements rotating in opposite directions. When such interferometer is placed in the rotating vehicle the $\delta \omega=4 (N+1/2) \ell \cdot \Omega$ rotational Doppler shift appears and rotation of the helical interference pattern with angular frequency $\delta \omega /{2 \ell}$ occurs. The accumulation of angular Doppler shift via successive passage through the $N$ image-inverting prisms is due to the phase conjugation, for conventional parabolic retroreflector the accumulation is absent. The features of such a vortex phase conjugating interferometry at the single photon level are discussed.

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