45-Mbit/s cat’s-eye modulating retroreflectors

Rabinovich, William S.; Goetz, Peter G.; Mahon, Rita; Swingen, Lee; Murphy, James L.; Ferraro, Mike S.; Burris, H. R.; Moore, Christopher I.; Suite, Michele R.; Gilbreath, G. C.; Binari, S.C.; Klotzkin, D.

doi:10.1117/1.2789634

Cited by 51 publications

(10 citation statements)

References 26 publications

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“…However, this method can only be realised if the movement of the spot is detectable and if the independent pixel drive is controllable by the circuitry. 5 Although the CCR based structure may also be used with the pixellation approach, this comes up with a higher power consumption, since all pixels need to be driven simultaneously. 10 Conversely, the MQW modulator's § inherent photosensitivity feature offers a great practicability when it is applied to CER.…”

Section: Cat's Eye Retroreflectorsmentioning

confidence: 99%

“…6 Moreover, the design of a flat focal plane CER MRR puts an additional restriction on the modulator: If the modulator is also used as back mirror, its flatness becomes important which is related to the Strehl ratio. 9 Also in Rabinovich's paper, 5 two design examples can be found to see the dimensions of these two structures. Although the aspheric curved focal plane CER design has some advantages on the FOV parameter when implementation issues are considered, the telecentric flat focal plane CER design has some obvious benefits: At first, the pixellation and the modulated structure can easier be fabricated for flat surfaces than for the curvature type focal plane ones.…”

Section: Cat's Eye Retroreflectorsmentioning

confidence: 99%

“…In this type, the thermal path from wafer to mount is only at the edges, whereas in the flat focal plane case, the thermal contact can be implemented over the whole entire wafer to reduce heating. 5,9 If a multicopter based system is considered, the goal is to reach a data rate that is as high as possible. This comes with the challenge that the modulator focal plane heats at a rate of 1.5 • C/Mbit/s.…”

Section: Cat's Eye Retroreflectorsmentioning

confidence: 99%

See 2 more Smart Citations

Lightweight, mobile free-space optical communications in disaster scenarios for transmission of Earth observation data: feasibility study

Topcu

Henniger

Grobe

et al. 2011

Free-Space and Atmospheric Laser Communications XI

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Free-space optical (FSO) links are an effective alternative to radio frequency (RF) to handle high-rate data transmission in case of a general communication service failure in disaster scenarios. Establishing high data rate links under the impacts of extreme environmental conditions, like the unregulated RF spectrum, is a very challenging issue. This paper focuses on multicopter (e.g., quadrocopter or hexacopter) based earth observation systems. Its main objective is to show that FSO communication can provide a high-rate link for transmitting earth observation data from a multicopter to a ground station, even under environmental disaster conditions. Before analyzing the feasibility of such an optical multicopter system, the main system structure will be discussed in detail. Several system designs will be compared and evaluated based on link budget calculations. In this process, a novel Grating Light Valve (GLV) retroreflector modulator technology will be introduced in this work. The study will emphasize that a reliable 100 Mbit/s FSO data transmission will be feasible to provide a downlink capacity for multicopter based earth observation systems.

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Section: Cat's Eye Retroreflectorsmentioning

confidence: 99%

Section: Cat's Eye Retroreflectorsmentioning

confidence: 99%

Section: Cat's Eye Retroreflectorsmentioning

confidence: 99%

See 1 more Smart Citation

Lightweight, mobile free-space optical communications in disaster scenarios for transmission of Earth observation data: feasibility study

Topcu

Henniger

Grobe

et al. 2011

Free-Space and Atmospheric Laser Communications XI

View full text Add to dashboard Cite

show abstract

“…Another method for realizing short-range ship-to-ship laser communication is using modulating retro-reflectors (MRRs). An MRR link uses an active ATP at one end and a small semi-passive MRR at the other [22][23][24][25]. For one end of the link, MRRs no longer have tight pointing requirements.…”

Section: Introductionmentioning

confidence: 99%

Shipborne Acquisition, Tracking, and Pointing Experimental Verifications towards Satellite-to-Sea Laser Communication

Wang

Xiang

et al. 2019

Applied Sciences

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Acquisition, tracking, and pointing (ATP) is a key technology in free space laser communication that has a characteristically high precision. In this paper, we report the acquisition and tracking of low-Earth-orbit satellites using shipborne ATP and verify the feasibility of establishing optical links between laser communication satellites and ships in the future. In particular, we developed a shipborne ATP system for satellite-to-sea applications in laser communications. We also designed an acquisition strategy for satellite-to-sea laser communication. In addition, a method was proposed for improving shipborne ATP pointing error. We tracked some stars at sea, achieving a pointing accuracy of less than 180μrad.We then acquired and tracked some low-Earth-orbit satellites at sea, achieving a tracking accuracy of about 20μrad. The results achieved in this work experimentally demonstrate the feasibility of ATP in satellite-to-sea laser communications.

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“…When these optoelectronic devices are illuminated by a laser, the echo wave is higher than the diffuse targets by 2-4 orders of magnitude, on average [1,2]. Detecting and recognizing cat-eye effect targets is an important technique in military reconnaissance [3], anticandid cameras [4], free-space communication [5][6][7], optoelectronic device identification and tracking [8,9], laser range finding [10], etc. In recent years, some methods have been developed to recognize cat-eye effect targets.…”

Section: Introductionmentioning

confidence: 99%

Compressive sensing method for recognizing cat-eye effect targets

Dang

et al. 2013

Appl. Opt.

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This paper proposes a cat-eye effect target recognition method with compressive sensing (CS) and presents a recognition method (sample processing before reconstruction based on compressed sensing, or SPCS) for image processing. In this method, the linear projections of original image sequences are applied to remove dynamic background distractions and extract cat-eye effect targets. Furthermore, the corresponding imaging mechanism for acquiring active and passive image sequences is put forward. This method uses fewer images to recognize cat-eye effect targets, reduces data storage, and translates the traditional target identification, based on original image processing, into measurement vectors processing. The experimental results show that the SPCS method is feasible and superior to the shape-frequency dual criteria method.

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45-Mbit/s cat’s-eye modulating retroreflectors

Cited by 51 publications

References 26 publications

Lightweight, mobile free-space optical communications in disaster scenarios for transmission of Earth observation data: feasibility study

Lightweight, mobile free-space optical communications in disaster scenarios for transmission of Earth observation data: feasibility study

Shipborne Acquisition, Tracking, and Pointing Experimental Verifications towards Satellite-to-Sea Laser Communication

Compressive sensing method for recognizing cat-eye effect targets

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