Papers Published

1. Sarunic, M.V. and Choma, M.A. and Yang, C. and Izatt, J.A., Instantaneous complex spectral domain OCT using 3×3 fiber couplers, Proc. SPIE - Int. Soc. Opt. Eng. (USA), vol. 5316 no. 1 (2004), pp. 241 - 7 [12.531422] .
   (last updated on 2007/04/13)

   Abstract:
   We report that the complex conjugate ambiguity in spectral domain OCT approaches (including swept source OCT and Fourier-domain OCT) may be removed by the use of novel interferometer designs based on N×N couplers. An interferometer based on a 3×3 truly fused fiber coupler with equal splitting ratios provides simultaneous access to components of the complex interferometric signal separated by 120°. These phase components may be converted to quadrature components by use of a simple trigonometric operation, and then inverse Fourier transformed to obtain A-scans and images free of complex conjugate artifact. We demonstrate instantaneous complex spectral-domain OCT using a novel Fourier-domain OCT system employing photodiode arrays, and will also report on a similar system design for instantaneous complex swept-source OCT

   Keywords:
   biomedical optical imaging;Fourier transform spectra;light interferometers;optical fibre couplers;optical tomography;