title: Spectral-domain optical coherence tomography with a Fresnel spectrometer.
abstract: We propose a novel spectral-domain optical coherence tomography (SD-OCT) equipped with a Fresnel spectrometer, which utilizes a Fresnel zone plate (FZP) as both dispersion and focusing optics and thus spreads the spectral interferogram evenly in wavenumber domain because of the proportional relation between the focal length of the FZP and the wavenumber. With no need of the conversion calculation from wavelength to wavenumber in conventional SD-OCT, this new design is favorable for fast imaging with high resolution. As only a FZP and CCD are used, the Fresnel spectrometer is simple and compact. It is experimentally shown that its performance is as good as that of numerical interpolation in conventional SD-OCT. Imaging of bio-tissue by Fresnel SD-OCT is also demonstrated.
authors.affiliation: State Key Laboratory of Low-dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, 100084, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Zhang
authors.forename: Tianyuan
authors.initials: T
authors.lastname: Chen
authors.forename: Chengming
authors.initials: C
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Tiancheng
authors.initials: T
authors.lastname: Huo
authors.forename: Jinggao
authors.initials: J
authors.lastname: Zheng
authors.forename: Ping
authors.initials: P
authors.lastname: Xue