6 September 2011 Quantum enhancement of a coherent ladar receiver using phase-sensitive amplification
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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.
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Peter A. Wasilousky, Peter A. Wasilousky, Kevin H. Smith, Kevin H. Smith, Ryan Glasser, Ryan Glasser, Geoffrey L. Burdge, Geoffrey L. Burdge, Lee Burberry, Lee Burberry, Bill Deibner, Bill Deibner, Michael Silver, Michael Silver, Robert C. Peach, Robert C. Peach, Christopher Visone, Christopher Visone, Prem Kumar, Prem Kumar, Oo-Kaw Lim, Oo-Kaw Lim, Gideon Alon, Gideon Alon, Chao-Hsiang Chen, Chao-Hsiang Chen, Amar R. Bhagwat, Amar R. Bhagwat, Paritosh Manurkar, Paritosh Manurkar, Michael Vasilyev, Michael Vasilyev, Muthiah Annamalai, Muthiah Annamalai, Nikolai Stelmakh, Nikolai Stelmakh, Zachary Dutton, Zachary Dutton, Saikat Guha, Saikat Guha, Cesar Santivañez, Cesar Santivañez, Jian Chen, Jian Chen, Marcus Silva, Marcus Silva, Will Kelly, Will Kelly, Jeffrey H. Shapiro, Jeffrey H. Shapiro, Ranjith Nair, Ranjith Nair, Brent J. Yen, Brent J. Yen, Franco N. C. Wong, Franco N. C. Wong, } "Quantum enhancement of a coherent ladar receiver using phase-sensitive amplification", Proc. SPIE 8163, Quantum Communications and Quantum Imaging IX, 816305 (6 September 2011); doi: 10.1117/12.892419; https://doi.org/10.1117/12.892419
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