Anti-turbulence Characteristics Of Ghost Imaging And Ultrasonic Non-local Double-slit Interference

Optics,as an both ancient and novel subject,is closely related to people’s daily life.Since the last century,according to the quantum entanglement of light,people have implemented a series of phenomena,such as HBT experiment,correlated experiment with entangled light source,correlated experiment with thermal light source and computational ghost imaging.This kind of imaging is different from traditional optics,also known as quantum imaging.Quantum imaging plays a vital role in many fields such as communication,remote sensing,medicine and military.we project and accomplish the related experimental study on sub-wavelength interference with thermal light based on the second-order correlation theory of thermal light.And we find that when the scanning position of the detector is shifted,the sub-wavelength interference fringes with thermal source will also shift.And when the scanning position of the detector is taken points in multiples,the fringe spacing of sub-wavelength interference fringes with thermal light will change regularly.We also design and complete the quantum imaging simulation based on atmospheric turbulence model,and analyze the influence of different adding positions of atmospheric turbulence on the imaging effects.For the first time,the ultrasonic grating device is introduced into the non-local associated optical system with thermal light in order to carry out the acousto-optic effect experimental research of two optical paths.This research can realize the non-local high-precision measurement of sound velocity in liquid,and can also realize the non-local double-slit interference and moire fringe phenomena,etc.The main contents and conclusions of this article are shown as below:We project the experiment to explore the influence of the change of scanning position of detector on the change of sub-wavelength interference fringe with thermal light source.On the basis of the sub-wavelength interference experiment with thermal light of ordinary double slit,we analyze the influence of scanning position variation on the position and spacing of interference fringes theoretically and experimentally.We find that when the experimental data of the signal optical path are scanned normally and the data of the reference optical path are shifted and then scanned,the fringes will also shift in the same direction,and their moving distance is half of the translation distance of the scanning position.And when we take points of data in multiples,the fringe spacing will vary according to a fixed formula.we project and accomplish the quantum imaging simulation experiment of atmospheric turbulence.Simulation results show that the larger the numbers of experimental frames,the better the quantum imaging effect.Construct the atmospheric turbulence model by using algorithm and add it to different positions in the optical path of the ghost imaging experiment.The simulation results show that different adding locations of atmospheric turbulence have different effects on the imaging effect of quantum imaging.But no matter how the atmospheric turbulence affects,adding in different positions can get a approximate outline of the object to be measured.It is proved that quantum imaging has anti-turbulence property.Lastly,we complete the single path acousto-optic effect experiment,and on this basis,we put forward the experimental scheme about nonlocal acousto-optic effect with thermal light source for the first time.In this experimental scheme,the ultrasonic field is introduced into the optical field,and the double slit and grating are replaced by the dynamic and artificially modulated equivalent ultrasonic grating.This research project provides the research idea for introducing other energy fields into the non-local imaging system.We analyze and summarize how to improve the correlation of the system to achieve more ideal experimental effect.