Based On The Compression Of 1064 Nm Light Imaging Experiments

Laser technology is applied widely to engineering, agriculture, medicine, and otherhigh-tech areas since the development of the laser. High-resolution imaging technique basedon laser technology has attracted extensive attention for their promising applications inbiomedical diagnostics and other non-invasive detection. Traditional imaging systems relyon the reflected light from the object, such as sunlight, moonlight, other natural light, and itsown radiation. This way of imaging has a certain limitation in some special areas, includingmedical diagnosis and treatment, biological medicine, biochemical composition analysis, andso on. The image resolution can be improved by using modern CCD cameras withsubsequent electronic processing. Imaging resolution is limited at certain level because ofthe follow two points：(1) The classical diffraction limit restricts the maximum of the opticalresolution.(2) The pixel size of optical sensor can not be too small as the light intensityreceived by each pixel decreases with the pixel size. As a result, the quality and resolution ofimages are strongly influenced by quantum fluctuation in the form of quantum noise.In this paper, the experimental research of imaging is explored based on squeezedinfrared light source prepared by the OPDC of PPKTP crystal in OPA. The structure of theimaging system and working principle are also introduced. Resolution contrast experiment isconducted under the different source of infrared squeezed light and infrared coherent light.The results of resolution prove that quantum imaging with squeezed light source will reducethe beam fluctuation in space and overcome the coherent laser shot-noise and the classicaldiffraction limit. The imaging system can be widely used for very faint luminescencedetecting, biological luminescence and weak light detection.The experimental results indicate that squeezed light is an important non-classical light,which can overcome the coherent laser shot-noise, the classical diffraction limit and limit ofquantum noise. The resolution of imaging with infrared squeezed light is1.26times that withinfrared coherent light under the same condition.