The invention discloses a light-spectrum phase calibration
system and a light-spectrum phase calibration method based on a
cascade Mach-Zehnder interferometer. A first reference interference
signal with
optical path difference d1 close to maximum imaging depth of the
system and a second reference interference
signal with
optical path difference d2 close to zero
optical path are separated from a
cascade MZI (
Mach Zehnder Interferometer) interference spectrum
signal through
Fourier transform, filtering and inverse
Fourier transform; the first reference interference signal is used for demarcating and calibrating a fractional part of a
light spectrum phase jump at the maximum imaging depth part in real time during a wave-number sampling process; the second reference interference signal is used for determining 2pi integer multiples of the
light spectrum phase jump at the maximum imaging depth part, wherein the
phase jump caused by an initial wave-number
jumping is in
linear relation with the depth; and the practical phase jump at any depth can be calibrated by combining the two reference interference signals. According to the light-spectrum phase calibration
system and the light-spectrum phase calibration method disclosed by the invention, not only is real-time linear calibration realized, but also calibration precision of the light-spectrum phase jump is ensured, so that a 2pi
confusion problem of the light-spectrum phase jump calibration is solved, and the real-time high-flexibility phase detection and the reconstruction of phase images can be realized.