A5103262845- Advanced Optical Sensing Technologies
- Advanced Measurement and Metrology Techniques
- Surface Roughness and Optical Measurements
- Optical measurement and interference techniques
- Orbital Angular Momentum in Optics
- Remote Sensing and LiDAR Applications
- Optical Wireless Communication Technologies
- Optical Polarization and Ellipsometry
- Image Enhancement Techniques
- Indoor and Outdoor Localization Technologies
- Quantum Information and Cryptography
- Scientific Measurement and Uncertainty Evaluation
- Optical Coherence Tomography Applications
- Optical Systems and Laser Technology
- Ocular and Laser Science Research
East China Normal University
2018-2022
Chongqing Normal University
2022
Photon-counting laser ranging has attracted a lot of research interest for its application in the altimeter. In this letter, we report large scale multi-beam photon-counting imaging system by using 100 beams linear array as light source. Taking advantage 100-channel low-noise high-efficiency single-photon detector, three-dimensional image remote targets could be constructed rapidly according to time-of-flight measurement. This provides solution high-speed, high-resolution, low...
We demonstrate a high-speed photon-counting laser ranging system with pulses of multiple repetition rates to extend the unambiguous range. In experiment, three different around 10 MHz were employed enlarge maximum range from 15 m 165 km. Moreover, distances was increased as well, enabling measurement on targets large separation distance high depth resolution. An outdoor up 21 km realized rate, which is beneficial for airborne and satellite-based topographic mapping.
A free-space communication scheme is proposed based on orbital angular momentum (OAM) states and pulse position modulation (PPM). It can not only improve the channel capacity, but also be suitable for single-photon detection to realize in case of ultra-weak light. parallel coding method high-capacity low bit error rate (BER) under high background. Theoretical simulation experimental results show that effectively suppress background noise. The BER as 1.27 × 10 <inline-formula...
We demonstrate a portable system integrated with time comparison, absolute distance ranging, and optical communication (TRC) to meet the requirements of space gravitational wave detection. A 1 km free-space asynchronous two-way link is performed. The TRC realizes 7.7×10-5 bit error rate Si avalanche photodiode single-photon detector, while signal intensity 1.4 photons per pulse background noise 3×104 counts second. measurement uncertainty 48.3 mm, comparison precision 162.4 ps. In this...
We designed a dual-wavelength photon-counting laser interferometer for absolute distance measurement of noncooperative targets. The weak optical interference on the rough surface was measured by single-photon detector. range nonambiguity less than 1.2 μm, as maximum errors Lg and Lr were 7.8 nm 9.1 caused frequency shift two unlocked lasers. integrated triangulation into coarse measurement, thus increasing to 6.5 mm. As result, standard deviation ∼18 achieved within 1.1 mm in experiment.
The decoherence in coherent lidar becomes serious with the increase distance. A small laser spot can suppress of echo light from noncooperation targets. However, it is very difficult to keep a over long In this paper, pulsed high sensitivity at few-photon level was demonstrated. phase plate used modulate wavefront achieve 100 m focusing which reduced effect. Based on detection and time-of-flight (TOF) measurements, long-distance ranging imaging all days realized. signal classification...