INVESTIGATION OF A SIGNAL PROCESSING METHOD FOR HIGH-SPEED OPTICAL COHERENT TOMOGRAPHY SYSTEMS
St. Petersburg State University of Information Technologies, Mechanics and Optics; Junior Scientist
I. P. Gurov
ITMO University, 197101, Saint Petersburg, Russian Federation; Department Head
M. V. Peterson
St. Petersburg State University of Information Technologies, Mechanics and Optics, Department of Computer Photonics; Student
Abstract. Method of asynchronous signal amplitude demodulation in optical coherent tomography is considered. The method is based on successive execution of quadratic transformation of informational component of the interferometric signal and low-pass filtering. Error in signal envelope restoration with the use of sub-discretization and decimation of signal readings is estimated with the account for additive noise effect. Examples are presented of signal envelope restoration with the use of Butterwort low-pass filter for useful signal detection in optical coherent tomography.
Keywords: optical coherent tomography, sub-discretization of signals, amplitude demodulation.