Sine-modulated wavelength-independent full-range complex spectral optical coherence tomography with an ultra-broadband light source

Zhang, Qiukun and Zhong, Shuncong and Zhong, Jianfeng (2015) Sine-modulated wavelength-independent full-range complex spectral optical coherence tomography with an ultra-broadband light source. Advances in Mechanical Engineering, 7 (5). pp. 1-9. ISSN 1687-8140

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    Abstract

    We present a full-range complex spectral domain optical coherence tomography with an ultra-broadband light source based on sinusoidal modulation. For the sinusoidal modulation strategy, a lead zirconate titanate stack actuator is employed to achieve the sinusoidal vibration of a mirror and therefore to get a series of spectral interferogram with different phase delays. The purpose of this strategy is to get higher performance complex-conjugate artifact elimination. Bessel separation of the signal sequence at each wavelength of the spectrometer was used to reconstruct the real and imaginary components of interference fringes; however, the sinusoidal modulation method is independent of light source wavelength. The experimental results demonstrated that the method had an excellent performance in a complex-conjugate suppression of 50 dB for a full width at half maximum bandwidth of 236 nm, and it has better anti-artifact ability and more flexible range in phase shifting than the conventional wavelength-dependent phase-shifting method on a full-range complex spectral optical coherence tomography system. Furthermore, the effect of the hysteresis error of lead zirconate titanate actuators on the performance of complex-conjugate artifact elimination was investigated and the solution of lead zirconate titanate positioning performance for both conventional phase-shifting and sine-modulation methods was suggested.

    • Item type:Article
      ID code:53591
      Dates:
      Date
      Event
      28 May 2015
      Published
      4 May 2015
      Accepted
      Keywords:sinusoidal phase modulation, complex-conjugate mirror error, spectral interferometry, optical coherence tomography, Optics. Light, Atomic and Molecular Physics, and Optics
      Subjects:Science > Physics > Optics. Light
      Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
      Depositing user: Pure Administrator
      Date deposited:04 Jul 2015 04:04
      Last modified:23 Sep 2021 05:08
      Related URLs:
      URI:https://strathprints.strath.ac.uk/id/eprint/53591
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