A5088205365- Orbital Angular Momentum in Optics
- Quantum Information and Cryptography
- Advanced Fiber Laser Technologies
- Optical Polarization and Ellipsometry
- Quantum optics and atomic interactions
- Quantum Mechanics and Applications
- Mechanical and Optical Resonators
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Force Microscopy Techniques and Applications
- Optical Network Technologies
- Advanced Optical Sensing Technologies
- Laser-Matter Interactions and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Image Processing Techniques
- Optical measurement and interference techniques
- Advanced Optical Imaging Technologies
- Optical Coherence Tomography Applications
Chongqing Three Gorges University
2021-2025
Chongqing University
2024
State Key Laboratory of Quantum Optics and Quantum Optics Devices
2017-2022
Shanxi University
2017-2022
Aided by quantum sources, metrology helps to enhance measurement precision. Here, we introduce a method the of rotation angle. As proof principle, assisted state called squeezed orbital-angular-position (OAP) and balance homodyne detection, demonstrate in experiments 3 dB-enhanced measurements rotation-angle beyond shot noise limit. A precision up 17.7 nrad/Hz is obtained. Furthermore, discuss means further improve with high-order OAP state. The holds promise for future practical...
The inseparability criterion provides a straightforward and efficient method for identifying quantifying two-mode Gaussian quantum entanglement, making it crucial tool in optics experiments. However, is to recognize that the serves only as sufficient condition entanglement assessment, thereby posing risk of missed detection during evaluation. This paper investigates use assessing squeezed states, with particular focus on examining due asymmetry. results show when decoherence symmetrically...
As a highly entangled quantum network, the cluster state has potential for greater information capacity and use in measurement-based computation. Here, we report generating continuous-variable quadripartite “square” of multiplexing orthogonal spatial modes single optical parametric amplifier (OPA), further improve quality entanglement by optimizing pump profile. We produce multimode two first-order Hermite–Gauss within one beam OPA transform it into phase correction. Furthermore,...
The spatial distribution of higher-order Hermite–Gaussian (HG) modes is more complicated than the fundamental mode, and characteristics different their orthogonal have essential applications in fields measurement, imaging, large-capacity communications. main issue future how to efficiently generate HG modes. light modulator has high resolution excellent maneuverability, so it a simple effective way Here, efficient generation via cascaded modulators was experimentally investigated. For HG90...
The squeezed state is important in quantum metrology and information. most effective generation tool known the optical parametric oscillator (OPO). Currently, only states of lower-order spatial modes can be generated by an OPO. However, higher-order are more useful for applications such as metrology, imaging, A major challenge future efficient generation. Here we use cascaded phase-only light modulators to modulate amplitude phase incident fundamental mode state. This efficiently generates a...
Due to its complex spatial distribution, the higher-order Hermite–Gaussian mode possesses significant application in fields such as precision measurement and optical communication. The light modulator, with capability modulate amplitude distribution of incident field, finds extensive applications information processing adaptive optics, thus making it an indispensable tool these fields. Using cascaded modulators can efficiently superbly generate a mode; however, experimental system is...
Nonclassical beams in high order spatial modes have attracted much interest but they exhibit less squeezing and entanglement than the fundamental modes, limiting their applications. We experimentally demonstrate relation between pump of first-order HG (HG10 entangled states) a type II OPO show that maximum can be obtained by optimizing mode. To our knowledge, this is first time to report this. Utilizing optimal mode, HG10 mode threshold reached easily without HG00 oscillation enhanced 53.5%...
Abstract Laser technology has made rapid progress in recent years and been widely used various fields such as medicine, biology, military, materials science. However, the limitations of traditional Gaussian intensity distribution laser beams applications have prompted emergence development flat-top beam shaping technology, which received widespread attention. Here, we introduce a new method for generating that combines Gerchberg-Saxton algorithm with convolutional neural networks, using...
We demonstrate experimentally a measurement scheme for the Stokes operators continuous-variable squeezed states of orbital angular momentum (OAM). An OAM state is generated by coupling dim Hermite-Gauss HG
The continuous-variable (CV) orbital angular momentum (OAM) entanglement is very different to the traditional quadrature entanglement. Stokes-operators directly reflect character of OAM light. Here, we report first direct experimental demonstration Stokes-operator Generated by transforming in HG01 mode onto basis, measured basis using a self-designed detection scheme. An inseparability I(O^2,O^3)<1 achieved over wide analyzing frequency 1-10 MHz. Moreover, fluctuations at 5.0 MHz are...
Long-term stable entanglement is a crucial aspect in the implementation of reliable quantum information processes. However, long-term continuous variable generation, especially type-II non-degenerate optical parametric amplifier, has yet to be reported on. Here, we derive relationship between and temperature fluctuations crystal propose novel method for generation by locking crystal. In experiment, obtain 5.4 dB lasting two hours. The holds promise truly usable above 10 brings us closer...
Continuous variable (CV) quantum squeezed state and entangled are important resources, which have been widely used in communication, metrology computation. In recent years, people paid much attention to the multi-mode optical parametric amplifier (OPO) process because non-classical light field is able construct multiplexing information system for improving working efficiency channel capacity. As a special field, frequency comb has measurement, atomic spectroscopy frequency-division...
The squeezed state is important in quantum metrology and information. most effective generation tool known the optical parametric oscillator (OPO). Currently, only states of lower-order spatial modes can be generated by an OPO. However, higher-order complex are more useful for applications such as metrology, imaging A major challenge future efficient generation. Here, we use cascaded phase-only light modulators to modulate amplitude phase incident fundamental mode state. This efficiently...