Resolving the complex conjugate ambiguity in Fourier-domain OCT by harmonic lock-in detection of the spectral interferogram

Optics Letters
Andrei B VakhtinDaniel J Kane

Abstract

A method of resolving the complex conjugate ambiguity in Fourier-domain OCT is described. The complex differential spectral interferogram is obtained by simultaneous acquisition of the first and second harmonics of the ac component of the phase-modulated interferogram. The harmonics represent the imaginary and real parts of the interferogram, respectively. The complex conjugate rejection ratio is found to be at least 45 dB and is limited by background noise.

References

Nov 22, 1991·Science·D HuangC A Puliafito
Aug 15, 2002·Journal of Biomedical Optics·Maciej WojtkowskiAdolf F Fercher
Aug 9, 2003·Optics Letters·Andrei B VakhtinDaniel J Kane
Dec 3, 2003·Optics Letters·Michael A ChomaJoseph A Izatt
Apr 21, 2003·Optics Express·R LeitgebAdolf Fercher
Jan 1, 1998·Journal of Biomedical Optics·G Ha Usler, M W Lindner

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Citations

Jun 26, 2008·Optics Express·Daniel Woods, Adrian Podoleanu
Mar 16, 2012·Optics Express·Petr BouchalAdrian Gh Podoleanu
Aug 3, 2011·Optics Letters·Chiung-Ting WuChun-Pin Chiang
Mar 22, 2012·Biomedical Optics Express·Al-Hafeez DhallaJoseph A Izatt
Feb 6, 2020·Biomedical Optics Express·Norman LippokBenjamin J Vakoc

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