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Signal-to-noise-ratio equations for a heterodyne laser radar

Charles A. DiMarzio, Scott C. Lindberg
1992 Applied Optics  
We analyze the signal-to-noise-ratio equations for a heterodyne laser radar with identical transmit and receive optics.  ...  This calculation can be used to evaluate a system in both near and far fields for focused and nonfocused systems.  ...  Once the coefficients for the output beam were determined, the beam profile could be determined for any range from the primary by making the appropriate phase change.  ... 
doi:10.1364/ao.31.004240 pmid:20725408 fatcat:euwvltzymngw7h2j7jbl4e5xyu

An Antenna with a Feeder for a Superconducting Terahertz Josephson Oscillator with Phase Locking

N. V. Kinev, K. I. Rudakov, L. V. Filippenko, A. M. Baryshev, V. P. Koshelets
2019 Journal of communications technology & electronics  
A principal layout of a Josephson terahertz radiation oscillator integrated with a transmitting antenna-lens system and a harmonic mixer (HM) for phase locking of radiation has been proposed and was successfully  ...  A study was carried out on matching the oscillator power and HM for two designs; the frequency range of pumping HM was 0.25-0.45 and 0.5-0.68 THz for the designs at 0.3 and 0.6 THz, respectively.  ...  the antenna and oscillator and used in the feedback loop with the oscillator for its phase stabilization using a phase-locked loop (PLL).  ... 
doi:10.1134/s1064226919090122 fatcat:il5yebe4kvedtcbyhu3xvkujxa

Tomography of an optomechanical oscillator via parametrically amplified position measurement

Prahlad Warszawski, Alexander Szorkovszky, Warwick P Bowen, Andrew C Doherty
2019 New Journal of Physics  
We propose a protocol for quantum state tomography of nonclassical states in optomechanical systems.  ...  Our analysis is based on the analytic description of the generalized measurement that is performed when optomechanical position measurement competes with thermal noise and a parametric drive.  ...  Acknowledgments The authors acknowledge the HPC service at The University of Sydney for providing cluster computing resources that have contributed to the research results reported within this paper.  ... 
doi:10.1088/1367-2630/ab044c fatcat:yevnsmytare47i6oflwv3luanq

Adaptive single-shot phase measurements: The full quantum theory

H. M. Wiseman, R. B. Killip
1998 Physical Review A. Atomic, Molecular, and Optical Physics  
The standard technique is to have the local oscillator detuned from the system (heterodyne detection) so that it is sometimes in phase and sometimes in quadrature with the system over the course of the  ...  This enables both quadratures of the system to be measured, from which the phase can be estimated. One of us [H.M. Wiseman, Phys. Rev.  ...  Having specified ⌽(v) all that remains to completely describe this heterodyne measurement is to determine Q(A,B), the ostensible probability distribution for the measurement results A,B.  ... 
doi:10.1103/physreva.57.2169 fatcat:r2l7h4guffe45evx4agxcq46qi

Novel ellipsometer design for the study of large thin films

Yao Lin, Alson E. Hatheway
1995 Optomechanical and Precision Instrument Design  
for the p and s polarizations, and A is the phase shift difference between the reflections for the p and s polarizations.  ...  These variations are mainly determined by the ratios of noise to signal in the systems.  ... 
doi:10.1117/12.218655 fatcat:iqf3lvyvtjb3rnmy2zh3y3wzqm

Active Optical Range Imaging Sensors [chapter]

Paul J. Besl
1989 Springer Series in Perception Engineering  
-angles to provide two independent channels for depth measurement.  ...  Quasi-Heterodyne (Phase-Shifted) Methods Phase-shifted holographic interferometers are referred to as quasi-heterodyne since their k/100 range resolution is not quite heterodyne performance, but is much  ...  However, the sensors are only one part of the technology needed for practical automated systems.  ... 
doi:10.1007/978-1-4612-4532-2_1 fatcat:jacqk6hhwzf73nvhonxitx6d6q

Active, optical range imaging sensors

Paul J. Besl
1988 Machine Vision and Applications  
-angles to provide two independent channels for depth measurement.  ...  Quasi-Heterodyne (Phase-Shifted) Methods Phase-shifted holographic interferometers are referred to as quasi-heterodyne since their k/100 range resolution is not quite heterodyne performance, but is much  ...  However, the sensors are only one part of the technology needed for practical automated systems.  ... 
doi:10.1007/bf01212277 fatcat:lmfx4oehf5be3eh7tgxxuu3lju

Nanoscale Non-Destructive Ferroelectric Characterization with Non-Contact Heterodyne Electrostrain Force Microscopy [article]

Qibin Zeng, Qicheng Huang, Hongli Wang, Caiwen Li, Zhen Fan, Deyang Chen, Yuan Cheng, Kaiyang Zeng
2021 arXiv   pre-print
In this study, a high-resolution non-contact ferroelectric measurement, named Non-Contact Heterodyne Electrostrain Force Microscopy (NC-HEsFM), has been introduced firstly.  ...  Meanwhile, the QTF-based force detection makes NC-HEsFM highly compatible for high-vacuum and low-temperature environments, providing ideal conditions for achieving an ultra-high spatial resolution to  ...  Li Lu (NUS) for great support of the SPA400 SPM in this study. Author Contributions  ... 
arXiv:2105.03088v1 fatcat:5vhvswgbpbdj5ankauoiz5btja

Effects of coherence and polarization changes on the heterodyne detection of stochastic beams propagating in free space

Mohamed Salem, Jannick P. Rolland
2008 Optics Communications  
We evaluate the heterodyne efficiency of a heterodyne (coherent) detection system for partially polarized, partially coherent, quasi-monochromatic beams.  ...  We discuss how the optimization of the detection system can be performed for received beams with different coherence and polarization properties by adjusting the corresponding properties of the local oscillator  ...  Emil Wolf, University of Rochester, for helpful comments related to the topic presented in this paper. We would like to thank Prof.  ... 
doi:10.1016/j.optcom.2008.07.015 fatcat:ytstf2efpfa6vegibade2vdyue

TianQin: a space-borne gravitational wave detector

Jun Luo, Li-Sheng Chen, Hui-Zong Duan, Yun-Gui Gong, Shoucun Hu, Jianghui Ji, Qi Liu, Jianwei Mei, Vadim Milyukov, Mikhail Sazhin, Cheng-Gang Shao, Viktor T Toth (+8 others)
2016 Classical and quantum gravity  
We describe the preliminary mission concept for TianQin, including the candidate source and experimental designs.  ...  We present estimates for the major constituents of the experiment's error budget and discuss the project's overall feasibility.  ...  At the moment, RX J0806.3+1527 (also known as HM Cancri or HM Cnc, hereafter J0806) stands out as the best choice, due to its orbital period that is the shortest known to date for a binary system, its  ... 
doi:10.1088/0264-9381/33/3/035010 fatcat:525zq7phqzeozmakw7hg4gapuu

Optical Resonance Imaging: An Optical Analog to MRI with Subdiffraction-Limited Capabilities

Marco A. Allodi, Peter D. Dahlberg, Richard J. Mazuski, Hunter C. Davis, John P. Otto, Gregory S. Engel
2016 ACS Photonics  
We propose here optical resonance imaging (ORI), a direct optical analog to magnetic resonance imaging (MRI). e proposed pulse sequence for ORI maps space to time and recovers an image from a heterodyne-detected  ...  third-order nonlinear photon echo measurement.  ...  As such, for the simulation of the signal shown in Fig. 2 , we can calculate a smaller number of solid angles, and because of the spacing of the emi ed spherical waves in time, accurately measure the  ... 
doi:10.1021/acsphotonics.6b00694 pmid:28451625 pmcid:PMC5403159 fatcat:ezuv4wqljbhy5enm7kqv7kkfhm

Dynamics of Gaussian discord between two oscillators interacting with a common environment

José Nahuel Freitas, Juan Pablo Paz
2012 Physical Review A. Atomic, Molecular, and Optical Physics  
Such a diagram (with phases corresponding to homodyne or heterodyne measurements) has similar topology to the one describing dynamical phases for the entanglement.  ...  The type of Gaussian measurement optimizing the extraction of information between the oscillators is fully characterized by means of a phase diagram.  ...  FIG. 2 : 2 Type of measurement that minimizes the Gaussian discord of the asymptotic state. HM: homodyne measurements. HT: heterodyne measurements. Ohmic environment and symmetric coupling.  ... 
doi:10.1103/physreva.85.032118 fatcat:g5ijzaqo3bdg3aa4odlpjaxjmm

Miniaturized laser heterodyne radiometer for measurements of CO2 in the atmospheric column

E. L. Wilson, M. L. McLinden, J. H. Miller, G. R. Allan, L. E. Ott, H. R. Melroy, G. B. Clarke
2013 Applied physics B  
We have developed a low-cost, miniaturized laser heterodyne radiometer for highly sensitive measurements of carbon dioxide (CO 2 ) in the atmospheric column.  ...  We would also like to thank Brent Holben and the entire AERONET team for their ongoing collaboration and support.  ...  Acknowledgments We would like to thank the NASA Goddard Space Flight Center's Internal Research and Development (IRAD) and Science Innovation Fund (SIF) programs for funding this effort.  ... 
doi:10.1007/s00340-013-5531-1 fatcat:eu5pfkttu5aktixybottulcura

Sub-millimeter heterodyne focal-plane arrays for high-resolution astronomical spectroscopy

Paul F. Goldsmith
2017 Radio Science Bulletin  
This work was carried out at the Jet Propulsion Laboratory, which is operated for NASAby the California Institute ofTechnology.  ...  He worked for years to get the Sardinia Radio Telescope built, and served with me on the Advisory Committee in the early years of the Large Millimeter Telescope in Mexico.  ...  It can be determined by laboratory measurements with spectral-line sources, which can be quite tedious when large RF and IF bandwidths are involved.  ... 
doi:10.23919/ursirsb.2017.8267373 fatcat:wgjabbfprzha7i6agpnm2ixd5e

Enhanced nonlinear optomechanics in a coupled-mode photonic crystal device [article]

Roel Burgwal, Ewold Verhagen
2022 arXiv   pre-print
In the same device we show linear optomechanical measurement with a strongly reduced input power and reveal how both enhancements are related.  ...  Here we demonstrate enhancement of nonlinear optomechanical measurement of mechanical motion by using pairs of coupled optical and mechanical modes in a photonic crystal device.  ...  Neveu for valueable discussions. We thank F. Koenderink for critical reading of the manuscript.  ... 
arXiv:2207.11114v1 fatcat:g7ga4yxb4zhenj7wpf555bwa6q
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