Optical coherence tomography with a nonlinear interferometer in the high parametric gain regime
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We demonstrate optical coherence tomography based on an SU(1,1) nonlinear interferometer with high-gain parametric down-conversion. For imaging and sensing applications, this scheme promises to outperform previous experiments working at low parametric gain, since higher photon fluxes provide lower integration times for obtaining high-quality images. In this way one can avoid using single-photon detectors or CCD cameras with very high sensitivities, and standard spectrometers can be used instead. Other advantages are: higher sensitivity to small loss and amplification before detection, so that the detected light power considerably exceeds the probing one.
CitationJ. Machado, G. [et al.]. Optical coherence tomography with a nonlinear interferometer in the high parametric gain regime. "Applied physics letters", 31 Agost 2020, vol. 117, núm. 94002.