Quantum enhancement of a coherent ladar receiver using phase-sensitive amplification
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; Silver, Michael; Peach, Robert C.; Visone, Christopher; Kumar, Prem; Lim, Oo-Kaw; Alon, Gideon; Chen, Chao-Hsiang; Bhagwat, Amar R.; Manurkar, Paritosh; Vasilyev, Michael; Annamalai, Muthiah; Stelmakhc, Nikolai; Dutton, Zachary; Guha, Saikat; Santivanez, Cesar; Chen, Jian; Silva, Marcus; Kelly, Will; ... Show more Show less
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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.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Research Laboratory of Electronics
Proceedings of SPIE--the International Society for Optical Engineering; v.8163
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)
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