4 results about "Optical phase conjugation" patented technology

The invention provides an energy-information collaborative optimization system and optimization method.The optimization system comprises a reverse communication module, a collaborative control unit, a pump laser and an optical phase conjugation module which are connected in sequence, and the reverse communication module is connected with a receiving end of an optical fiber energy-information co-transmission system; the optical phase conjugation module is used for acquiring output electric power of a receiving end photocell and a communication performance index for representing communication quality, and is arranged at a midpoint position of an optical fiber link; the cooperative control unit is used for reading the output electric power of the photocell and the communication performance index acquired by the reverse communication module and dynamically adjusting the output of the pump laser based on the output electric power of the photocell and the communication performance index, so that the phase conjugation efficiency of the optical phase conjugation module is changed; therefore, the value of the comprehensive performance function is maximized. According to the energy-information collaborative optimization system and optimization method, collaborative optimization of communication quality and energy transmission efficiency can be realized.

An entanglement-assisted multistatic quantum radar detection technique employs the integrated entangled source shared among multiple transmitters and performing transmit side optical phase conjugation. EA receivers are based on classical homodyne detection schemes. The EA multistatic radar detection technique is evaluated against bistatic radar EA detection scheme and various coherent states-based quantum detection schemes (the optimum quantum detector. Helstrom threshold detector, and random phase optimum quantum detector). The EA multistatic target detection probability is significantly better than that of corresponding bistatic radar EA detection techniques. coherent states-based quantum detection techniques. and the classical radar detection schemes. When both scattered signal photon channels and idler channels are noisy and lossy, the scheme significantly outperforms the EA bistatic radar scheme.

The invention discloses a vortex light generation system and method based on digital optical phase conjugation, and belongs to the technical field of optical communication. The system comprises a light source generation module, an interference acquisition module, a scattering medium module, a phase conjugate reconstruction module and a reverse modulation module. The interference acquisition module is used for acquiring interference signals; the phase conjugate reconstruction module extracts a wavefront signal and reconstructs a wavefront complex conjugate signal; and the reverse modulation module carries out dynamic modulation and generates target vortex light. High-fidelity reconstruction and particle control of vortex light beams are achieved through wavefront recording and conjugate playback at the output end of the scattering medium, the device has the functions of far-end transmission, non-contact operation, topological charge adjustment and the like, stable capture and controllable rotation of particles can be achieved, a reliable technical path is provided for optical micro-control under the scattering medium, and the device is suitable for large-scale popularization and application. And the method has a wide application prospect in the fields of operation in biological cells, integrated microfluidics, remote precise control and the like.

The application discloses a transparent material stress birefringence online polarization defect classification method and relates to the field of transparent material optical detection. The method comprises the following steps: collecting an original polarization image of a to-be-detected transparent material, pre-processing the original polarization image, and generating a calibrated polarization image; canceling vibration noise in the light path of the calibrated polarization image based on an optical phase conjugation technology to obtain a pure polarization light field signal; calculating a retardation distribution diagram of the transparent material according to the pure polarization light field signal, performing topological data analysis on the retardation distribution diagram, and extracting a macroscopic topological feature vector; and dividing the macroscopic topological feature vector into macroscopic layout features reflecting the overall topological structure of a stress field and microscopic morphological features reflecting the local geometric morphology of a defect according to feature sources and physical meanings. The application realizes high-precision defect classification and effectively solves the problem of low classification precision caused by large vibration interference and insufficient feature representation in online detection.