Quantum enhanced LIDAR resolution with multi-spatial-mode phase sensitive amplification
Phase-sensitive amplification (PSA) can enhance the signal-to-noise ratio (SNR) of an optical measurement suffering from detection inefficiency. Previously, we showed that this increased SNR improves LADAR-imaging spatial resolution when infinite spatial-bandwidth PSA is employed. Here, we evaluate...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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SPIE
2012
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| Online Access: | http://hdl.handle.net/1721.1/73931 https://orcid.org/0000-0002-6094-5861 |
| _version_ | 1826193805179617280 |
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| author | Santivanez, Cesar A. Guha, Saikat Dutton, Zachary Annamalai, Muthiah Vasilyev, Michael Yen, Brent J. Nair, Ranjith Shapiro, Jeffrey H. |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Santivanez, Cesar A. Guha, Saikat Dutton, Zachary Annamalai, Muthiah Vasilyev, Michael Yen, Brent J. Nair, Ranjith Shapiro, Jeffrey H. |
| author_sort | Santivanez, Cesar A. |
| collection | MIT |
| description | Phase-sensitive amplification (PSA) can enhance the signal-to-noise ratio (SNR) of an optical measurement suffering from detection inefficiency. Previously, we showed that this increased SNR improves LADAR-imaging spatial resolution when infinite spatial-bandwidth PSA is employed. Here, we evaluate the resolution enhancement for realistic, finite spatial-bandwidth amplification. PSA spatial bandwidth is characterized by numerically calculating the input and output spatial modes and their associated phase-sensitive gains under focused-beam pumping. We then compare the spatial resolution of a baseline homodyne-detection LADAR system with homodyne LADAR systems that have been augmented by pre-detection PSA with infinite or finite spatial bandwidth. The spatial resolution of each system is quantified by its ability to distinguish between the presence of 1 point target versus 2 closely-spaced point targets when minimum error-probability decisions are made from quantum limited measurements. At low (5-10 dB) SNR, we find that a PSA system with a 2.5kWatts pump focused to 25μm × 400μm achieves the same spatial resolution as a baseline system having 5.5 dB higher SNR. This SNR gain is very close to the 6 dB SNR improvement possible with ideal (infinite bandwidth, infinite gain) PSA at our simulated system detection efficiency (0.25). At higher SNRs, we have identified a novel regime in which finite spatial-bandwidth PSA outperforms its infinite spatial-bandwidth counterpart. We show that this performance crossover is due to the focused pump system's input-to-output spatial-mode transformation converting the LADAR measurement statistics from homodyne to heterodyne performance. |
| first_indexed | 2024-09-23T09:45:41Z |
| format | Article |
| id | mit-1721.1/73931 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:45:41Z |
| publishDate | 2012 |
| publisher | SPIE |
| record_format | dspace |
| spelling | mit-1721.1/739312022-09-26T13:31:56Z Quantum enhanced LIDAR resolution with multi-spatial-mode phase sensitive amplification Santivanez, Cesar A. Guha, Saikat Dutton, Zachary Annamalai, Muthiah Vasilyev, Michael Yen, Brent J. Nair, Ranjith Shapiro, Jeffrey H. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Research Laboratory of Electronics Yen, Brent J. Nair, Ranjith Shapiro, Jeffrey H. Phase-sensitive amplification (PSA) can enhance the signal-to-noise ratio (SNR) of an optical measurement suffering from detection inefficiency. Previously, we showed that this increased SNR improves LADAR-imaging spatial resolution when infinite spatial-bandwidth PSA is employed. Here, we evaluate the resolution enhancement for realistic, finite spatial-bandwidth amplification. PSA spatial bandwidth is characterized by numerically calculating the input and output spatial modes and their associated phase-sensitive gains under focused-beam pumping. We then compare the spatial resolution of a baseline homodyne-detection LADAR system with homodyne LADAR systems that have been augmented by pre-detection PSA with infinite or finite spatial bandwidth. The spatial resolution of each system is quantified by its ability to distinguish between the presence of 1 point target versus 2 closely-spaced point targets when minimum error-probability decisions are made from quantum limited measurements. At low (5-10 dB) SNR, we find that a PSA system with a 2.5kWatts pump focused to 25μm × 400μm achieves the same spatial resolution as a baseline system having 5.5 dB higher SNR. This SNR gain is very close to the 6 dB SNR improvement possible with ideal (infinite bandwidth, infinite gain) PSA at our simulated system detection efficiency (0.25). At higher SNRs, we have identified a novel regime in which finite spatial-bandwidth PSA outperforms its infinite spatial-bandwidth counterpart. We show that this performance crossover is due to the focused pump system's input-to-output spatial-mode transformation converting the LADAR measurement statistics from homodyne to heterodyne performance. United States. Defense Advanced Research Projects Agency. Quantum Sensors Program (AFRL Contract FA8750-09-C-0194) 2012-10-12T15:34:20Z 2012-10-12T15:34:20Z 2011-09 2011-08 Article http://purl.org/eprint/type/ConferencePaper 0277-786X http://hdl.handle.net/1721.1/73931 Cesar A. Santivanez ; Saikat Guha ; Zachary Dutton ; Muthiah Annamalai ; Michael Vasilyev ; Brent J. Yen ; Ranjith Nair ; Jeffrey H. Shapiro; Quantum enhanced lidar resolution with multi-spatial-mode phase sensitive amplification. Proc. SPIE 8163, Quantum Communications and Quantum Imaging IX, 81630Z (September 06, 2011). SPIE © 2011 https://orcid.org/0000-0002-6094-5861 en_US http://dx.doi.org/10.1117/12.903351 Proceedings of SPIE--the International Society for Optical Engineering; v.8163 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. application/pdf SPIE SPIE |
| spellingShingle | Santivanez, Cesar A. Guha, Saikat Dutton, Zachary Annamalai, Muthiah Vasilyev, Michael Yen, Brent J. Nair, Ranjith Shapiro, Jeffrey H. Quantum enhanced LIDAR resolution with multi-spatial-mode phase sensitive amplification |
| title | Quantum enhanced LIDAR resolution with multi-spatial-mode phase sensitive amplification |
| title_full | Quantum enhanced LIDAR resolution with multi-spatial-mode phase sensitive amplification |
| title_fullStr | Quantum enhanced LIDAR resolution with multi-spatial-mode phase sensitive amplification |
| title_full_unstemmed | Quantum enhanced LIDAR resolution with multi-spatial-mode phase sensitive amplification |
| title_short | Quantum enhanced LIDAR resolution with multi-spatial-mode phase sensitive amplification |
| title_sort | quantum enhanced lidar resolution with multi spatial mode phase sensitive amplification |
| url | http://hdl.handle.net/1721.1/73931 https://orcid.org/0000-0002-6094-5861 |
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