Quantum enhancement of a coherent ladar receiver using phase-sensitive amplification
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Shapiro_Quantum enhancement of a coherent.pdf
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Author(s)
Shapiro, Jeffrey H.
Nair, Ranjith
Yen, Brent J.
Wong, Franco N. C.
Wasilousky, Peter A.
Smith, Kevin H.
Glasser, Ryan
Burdge, Geoffrey L.
Burberry, Lee
Deibner, Bill
Date Issued
August 2011
Journal
Proceedings of SPIE--the International Society for Optical Engineering; v.8163
Publisher
SPIE
Citation
Wasilousky, Peter A. et al. “Quantum Enhancement of a Coherent Ladar Receiver Using Phase-sensitive Amplification.” Proceedings of SPIE--the International Society for Optical Engineering; v. 8163. 816305–816305–15, 2011. © (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE)
Version
Final published version
Abstract
We demonstrate a balanced-homodyne LADAR receiver employing a phase-sensitive amplifier (PSA) to raise the effective photon detection efficiency (PDE) to nearly 100%. Since typical LADAR receivers suffer from losses in the receive optical train that routinely limit overall PDE to less than 50% thus degrading SNR, PSA can provide significant improvement through amplification with noise figure near 0 dB. Receiver inefficiencies arise from sub-unity quantum efficiency, array fill factors, signal-local oscillator mixing efficiency (in coherent receivers), etc. The quantum-enhanced LADAR receiver described herein is employed in target discrimination scenarios as well as in imaging applications. We present results showing the improvement in detection performance achieved with a PSA, and discuss the performance advantage when compared to the use of a phase-insensitive amplifier, which cannot amplify noiselessly.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1117/12.892419
