A5061845278- Advanced Optical Sensing Technologies
- Random lasers and scattering media
- Advanced Fluorescence Microscopy Techniques
- Optical Coherence Tomography Applications
- Remote Sensing and LiDAR Applications
- Mechanical and Optical Resonators
- Advanced Optical Imaging Technologies
- CCD and CMOS Imaging Sensors
- Quantum Mechanics and Applications
- Advanced Fiber Laser Technologies
- Computer Graphics and Visualization Techniques
- Photoacoustic and Ultrasonic Imaging
- Photonic and Optical Devices
- Quantum Information and Cryptography
Harbin Institute of Technology
2018-2023
Non-line-of-sight imaging has attracted more attentions for its wide applications. Even though ultrasensitive cameras/detectors with high time-resolution are available, current back-projection methods still powerless to acquire a satisfying reconstruction of multiple hidden objects due severe aliasing artifacts. Here, novel method is developed reconstruct objects. Our considers decomposing all the ellipsoids in confidence map into several "clusters" belonging different (namely "ellipsoid...
Photon-counting LiDAR encounters interference from background noise in remote target detection, and the statistical detection of accumulation multiple pulses is necessary to eliminate uncertainty responses Geiger-mode avalanche photodiode (Gm-APD). The cumulative number detections difficult select due lack effective evaluation influence noise. In this work, a signal method based on photon entropy (PSE) proposed by developing process Gm-APD as an information transmission model. A prediction...
Non-line-of-sight (NLoS) imaging is a newly developed technique with widespread applications in recent years. At present, it difficult for NLoS to achieve high-resolution reconstruction an existing back-projection method. We propose novel approach based on the Richardson-Lucy deconvolution of time histograms imaging. In our approach, backscattering photons from line-of-sight scene, often regarded as adverse factors, are used favorably priors histograms. All deconvoluted back projected into...
An effective approach for general measurement based on weak value amplification using non-Gaussian broadband light sources is demonstrated. This scheme can reduce the difficulty of preparing apparatus and correcting systematic error caused by imperfection device's wave function, thus making weak-value more convenient robust practical field applications. The influence several common noise in a application analyzed theoretically examined experimentally. A purely imaginary phase system...
Photon counting Lidar applied to long-distance ranging will face the problem of number received photons fluctuating with target distance and reflectivity. The Poisson probability model indicates that range walk error system fluctuates photons, which deteriorates performance ranging. We propose a novel approach based on distribution regulator feedback mechanism achieve small stable by actively controlling incident detector. In this method, attenuation rate varies ensure detector is fixed...
Photon counting lidar for long-range detection faces the problem of declining ranging performance caused by background noise. Current anti-noise methods are not robust enough in case weak signal and strong noise, resulting poor error. In this work, based on characteristics uncertainty echo noise photon lidar, an entropy-based method is proposed to reduce error under high Firstly, entropy, which considered as feature distinguish from defined quantify fluctuation among events responding Geiger...
Photon-counting LiDAR using a two-dimensional (2D) array detector has the advantages of high lateral resolution and fast acquisition speed. The non-uniform intensity profile illumination beam quantum efficiency detectors in 2D deteriorate imaging quality. Herein, we propose photon-counting system that uses spatial light modulator to control compensate for both beam, variation array. By 635 nm peak wavelength 4 mW average power semiconductor laser, lab-based experiments at 4.27 m stand-off...
A novel method for receiving weak microwave photonics signals based on a micro-ring resonator is proposed. This approach uses the nonlinear interaction of and an optical pump to generate up-conversion signal achieve reception. The minimum detectable power this reaches -89.79 dBm, which suitable detection signals. conversion efficiency bandwidth have 10 times promotion compared similar methods at room temperature. result also demonstrates that sensitivity can be improved by five orders...
Benefiting from deep learning (DL), great progress has been made in the research of imaging through scattering media. Most DL methods use a training set aligned image pairs to learn mapping between speckle and object image. However, alignment process dataset is invasive, which will be greatly limited actual scenes. Here, we propose method for non-invasive media based on learning. In this method, preprocess unaligned images obtain their respective autocorrelation images. Then, are fed into...