Phase-conjugate optical coherence tomography

Details Phase-conjugate optical coherence tomography Phase-conjugate optical coherence tomography

2006-07-18

arxiv.org/abs/quant-ph/0607125v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevA.74.041601

Quantum optical coherence tomography (Q-OCT) offers a factor-of-two improvement in axial resolution and the advantage of even-order dispersion cancellation when it is compared to conventional OCT (C-OCT). These features have been ascribed to the non-classical nature of the biphoton state employed in the former, as opposed to the classical state used in the latter. Phase-conjugate OCT (PC-OCT), introduced here, shows that non-classical light is not necessary to reap Q-OCT's advantages. PC-OCT uses classical-state signal and reference beams, which have a phase-sensitive cross-correlation, together with phase conjugation to achieve the axial resolution and even-order dispersion cancellation of Q-OCT with a signal-to-noise ratio that can be comparable to that of C-OCT.

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