Resumen
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.
Idioma original | Inglés |
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Título de la publicación alojada | Quantum Communications and Quantum Imaging IX |
DOI | |
Estado | Publicada - 2011 |
Publicado de forma externa | Sí |
Evento | Quantum Communications and Quantum Imaging IX - San Diego, CA, Estados Unidos Duración: 24 ago. 2011 → 25 ago. 2011 |
Serie de la publicación
Nombre | Proceedings of SPIE - The International Society for Optical Engineering |
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Volumen | 8163 |
ISSN (versión impresa) | 0277-786X |
Conferencia
Conferencia | Quantum Communications and Quantum Imaging IX |
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País/Territorio | Estados Unidos |
Ciudad | San Diego, CA |
Período | 24/08/11 → 25/08/11 |