Quantum enhancement of a coherent ladar receiver using phase-sensitive amplification

Quantum enhancement of a coherent ladar receiver using phase-sensitive amplification

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...

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Detalhes bibliográficos
Principais autores: 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
Outros Autores: Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Formato: Artigo
Idioma:en_US
Publicado em: SPIE 2012
Acesso em linha:http://hdl.handle.net/1721.1/73980
https://orcid.org/0000-0003-1998-6159
https://orcid.org/0000-0002-6094-5861
Descrição
Resumo: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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