Chirped amplitude modulation ladar for range and Doppler measurements and 3-D imaging

Stann, Barry L.; Redman, Brian; Lawler, William B.; Giza, Mark M.; Dammann, J. Francis; Krapels, Keith A.

doi:10.1117/12.719523

“…Although the CCD camera in the reference path is used in our present system, it can be removed by the techniques such as computational ghost imaging 28 and single-pixel 3D imaging can be achieved, which can overcome the sampling frame frequency of the CCD camera to the imaging speed and has a great application prospect for 3D imaging in the wavelength regions without cameras. In addition, using a much more narrow pulsed laser or chirped-amplitude modulation pulse compression method 29 , the depth resolution of 3D GISC can be dramatically improved. For example, if the pulse width of the laser is 1 picosecond, the depth resolution will be improved to 0.15 mm.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional ghost imaging lidar via sparsity constraint

Gong

¹

,

Zhao

²

,

Ye

³

et al. 2016

Sci Rep

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Three-dimensional (3D) remote imaging attracts increasing attentions in capturing a target’s characteristics. Although great progress for 3D remote imaging has been made with methods such as scanning imaging lidar and pulsed floodlight-illumination imaging lidar, either the detection range or application mode are limited by present methods. Ghost imaging via sparsity constraint (GISC), enables the reconstruction of a two-dimensional N-pixel image from much fewer than N measurements. By GISC technique and the depth information of targets captured with time-resolved measurements, we report a 3D GISC lidar system and experimentally show that a 3D scene at about 1.0 km range can be stably reconstructed with global measurements even below the Nyquist limit. Compared with existing 3D optical imaging methods, 3D GISC has the capability of both high efficiency in information extraction and high sensitivity in detection. This approach can be generalized in nonvisible wavebands and applied to other 3D imaging areas.

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“…The detection process is simulated by computing Eq. ( 12) and (13). By using a digital BPF, we can get the baseband current ĩn (x t ,t), corresponding to Eq.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Pulse-compression ghost imaging lidar via coherent detection

Deng,

Gong,

Han

2016

Preprint

0

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Ghost imaging (GI) lidar, as a novel remote sensing technique, has been receiving increasing interest in recent years. By combining pulse-compression technique and coherent detection with GI, we propose a new lidar system called pulse-compression GI lidar. Our analytical results, which are backed up by numerical simulations, demonstrate that pulse-compression GI lidar can obtain the target's spatial intensity distribution, range and moving velocity. Compared with conventional pulsed GI lidar system, pulse-compression GI lidar, without decreasing the range resolution, is easy to obtain high single pulse energy with the use of a long pulse, and the mechanism of coherent detection can eliminate the influence of the stray light, which can dramatically improve the detection sensitivity and detection range.

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“…(12) and (13). By using a digital BPF, we can get the baseband currentĩ n (x t ,t), corresponding to Eq.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…Coherent detection and pulse-compression technique is valid to solve the conflict described above in chirped amplitude modulated (Chirped-AM) lidar [13,14]. A Chirped-AM light is emitted, and the return light is received by coherent detection and pulse-compression.…”

Section: Introductionmentioning

confidence: 99%

Pulse-compression ghost imaging lidar via coherent detection

Deng

¹

,

Gong

²

,

Han

³

2016

View full text Add to dashboard Cite

Ghost imaging (GI) lidar, as a novel remote sensing technique, has been receiving increasing interest in recent years. By combining pulse-compression technique and coherent detection with GI, we propose a new lidar system called pulse-compression GI lidar. Our analytical results, which are backed up by numerical simulations, demonstrate that pulse-compression GI lidar can obtain the target's spatial intensity distribution, range and moving velocity. Compared with conventional pulsed GI lidar system, pulse-compression GI lidar, without decreasing the range resolution, is easy to obtain high single pulse energy with the use of a long pulse, and the mechanism of coherent detection can eliminate the influence of the stray light, which can dramatically improve the detection sensitivity and detection range.

show abstract

Chirped amplitude modulation ladar for range and Doppler measurements and 3-D imaging

Cited by 13 publications

References 2 publications

Three-dimensional ghost imaging lidar via sparsity constraint

Three-dimensional ghost imaging lidar via sparsity constraint

Pulse-compression ghost imaging lidar via coherent detection

Pulse-compression ghost imaging lidar via coherent detection

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