Quantum enhancement of a coherent ladar receiver using phase-sensitive amplification

Wasilousky, Peter A.; Smith, Kevin H.; Glasser, Ryan T.; Burdge, Geoffrey L.; Burberry, Lee M.; Deibner, Bill; Silver, Michael; Peach, R.C.; Visone, Christopher; Kumar, Prem; Lim, Oo Kaw; Alon, Gideon; Chen, Chao Hsiang; Bhagwat, Amar R.; Manurkar, Paritosh; Vasilyev, Michael; Annamalai, Muthiah; Stelmakh, N.; Dutton, Zachary; Guha, Saikat; Santivañez, Cesar; Chen, Jian; Silva, Marcus; Kelly, W. L.; Shapiro, Jeffrey H.; Nair, Ranjith; Yen, Brent J.; Wong, Franco N. C.

doi:10.1117/12.892419

Cited by 5 publications

(4 citation statements)

References 4 publications

(1 reference statement)

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“…For PSA, the gain during optical parametric amplification varies with the phase between the signal light and the pump light. It has been demonstrated that the PSA process does not introduce additional noise and therefore has the capability of noiseless amplification [20]- [23] .…”

Section: Noiseless Phase-sensitive Amplificationmentioning

confidence: 99%

Technology research of 1km quantum lidar system

Bi,

Sheng,

Zhou

et al. 2023

Infrared Remote Sensing and Instrumentation XXXI

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Lidar (laser radar) offers advantages over conventional radar in terms of higher resolution, greater Anti-interference capability and Ultra-low altitude detection performance. However, Lidar has now reached a bottleneck in terms of detection range and is no longer able to correctly identify targets beyond 500 meters, thus failing to meet the requirements for detection, measurement and imaging.To break this bottleneck, we have developed a Quantum Lidar with a detection range of up to one kilometre, which is based on a quantum vacuum squeezed laser and can compress the photon fluctuation by 5.6dB in the vacuum state through quasi-phase matching in non-linear crystals, reducing the quantum noise of laser which accounts for 73% of the lidar, thus reducing the overall noise of the quantum lidar by 3.27dB and improves the phase stability of the laser (from 10 minutes to more than 120 minutes) to achieve higher accuracy measurements, with a Signal-Noise Ratio (SNR) twice that of conventional lidar, and therefore a sensitivity twice as high.The basic technical implementation is to use a 20W power 1064nm wavelength continuous wave laser (CW, M ² less than or equal to 1.05) to irradiate a target located one kilometre away. By detecting a very weak reflected laser (power=10μW ± 5μW) which is exponentially attenuated by distance, We use noiseless amplification by a quantum vacuum-squeezed laser with the same power magnitude to obtain a higher power (7dB amplification) and higher signalnoise ratio ( 4.77dB SNR improvement). A reflective lens set (250mm aperture) of our design is used to receive the laser diffusion due to the 4mrad transmission angle of one kilometre.In the squeezed laser system, the resonant cavity locking efficiency is improved to 99.7%, and the re-locking time is less than 0.3s, it is directly switchable with the balance homodyne detection system. The mode cleaner improves the transverse mode quality(the mode bandwidth is reduced by 67%) while filtering high-frequency noise.The quantum lidar imaging system has been developed, and the experimental results show that the resolution of the laboratory-simulated long-range decay experiment is 3 times higher than that of traditional lidar is a promising development. This means that the system can detect and image smaller objects and features with greater accuracy and precision.The use of a self-developed quantum enhancement algorithm to obtain a 5 times higher contrast lidar image is also a significant improvement, and the use of a quantum denoising algorithm to reduce graphic distortion and image scatter caused by atmospheric pollution and environmental interference is a critical development. These issues can significantly degrade the quality of lidar images, so being able to mitigate their effects is a significant step forward.Through a self-developed LiDAR 3D reconstruction algorithm, the reconstruction efficiency is increased by 3 times and the resolution is increased by 2.5 times ， which means that the reconstructed 3D model is faster, more detailed and accur...

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Section: Noiseless Phase-sensitive Amplificationmentioning

confidence: 99%

Technology research of 1km quantum lidar system

Bi,

Sheng,

Zhou

et al. 2023

Infrared Remote Sensing and Instrumentation XXXI

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“…In a quantum ladar system, the technology of phase-sensitive amplification [11] and squeezed-vacuum injection are developed to enhance to improve the resolution of ladar [12,13]. It is shown that a coherent ladar that employs phase-sensitive amplification prior to homodyne detection, owns a superior spatial resolution, including distance and angular.…”

Section: B Quantum Ladar and Quantum Illumination Radarmentioning

confidence: 99%

Quantum information technology in radar system

Zhou¹,

Qian²,

Zhang³

2014

Proceedings of 2nd International Conference on Information Technology and Electronic Commerce

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Quantum radar is a remote sensor that exploits quantum phenomena to perceive target in the distance and receive its state information. In this article, the concept and principle of quantum radar are introduced in detail, including interferometric quantum radar, quantum ladar and quantum illumination radar. And it is proved in theory that quantum radar can beat standard quantum limitation and surpass classical radar. Keywords-Quantum information; quantum sensor; quantum radar; quantum entanglement.

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“…However, the values of τ in the Harris Corp. GCSD experiments [5] are ∼200 psec while the integration time in their system is T I ∼ 1 μsec, owing to the slow photodetectors employed. Therefore, the edge effects of pulses being cut off by the integration interval are negligible.…”

Section: Homodyne Photocount Operatormentioning

confidence: 99%

“…In the architecture conceived for the Harris experiments [5], the LO temporal waveform ξ T (t) is the same as the PSA pump waveform and the SVI pump waveform is advanced by the roundtrip time delay, 2Δ, between the detector and pupil planes. Similar to Subsec.…”

Section: Quantum-enhanced Ladar Systemmentioning

confidence: 99%

Quantum-enhanced ladar ranging with squeezed-vacuum injection, phase-sensitive amplification, and slow photodetectors

et al. 2011

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Theory has shown [1] that the quantum enhancements afforded by squeezed-vacuum injection (SVI) and phasesensitive amplification (PSA) can improve the spatial resolution of a soft-aperture, homodyne-detection laserradar (ladar) system. Here we show they can improve the range resolution of such a ladar system. In particular, because an experimental PSA-enhanced system is being built whose slow photodetectors imply multi-pulse integration, we develop range-measurement theory that encompasses its processing architecture. We allow the target to have an arbitrary mixture of specular and speckle components, and present computer simulation results demonstrating the range-resolution improvement that accrues from quantum enhancement with PSA.

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Quantum enhancement of a coherent ladar receiver using phase-sensitive amplification

Cited by 5 publications

References 4 publications

Technology research of 1km quantum lidar system

Technology research of 1km quantum lidar system

Quantum information technology in radar system

Quantum-enhanced ladar ranging with squeezed-vacuum injection, phase-sensitive amplification, and slow photodetectors

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