Overview of NRL's maritime laser communication test facility

Moore, Christopher I.; BurrisJr., Harris R.; Rabinovich, William S.; Wasiczko, Linda M.; Suite, Michele R.; Swingen, Lee; Mahon, Rita; Stell, Mena F.; Gilbreath, G. C.; Scharpf, William J.

doi:10.1117/12.622252

Cited by 10 publications

(5 citation statements)

References 10 publications

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“…Several experimental data and measurements indicate that the turbulence in the upper troposphere and stratosphere, or along nonhomogeneous path, deviates from predictions of the Kolmogorov model [2][3][4][5][6]. Other experiments showed that atmospheric turbulence in maritime environments can assume a different statistical behavior with respect to Kolmogorov [7][8][9][10][11][12][13]. In addition, anisotropy in stratospheric turbulent inhomogeneities has been experimentally investigated [14][15][16][17], and laboratory results have shown that turbulence can be anisotropic.…”

Section: Introductionmentioning

confidence: 99%

Light propagation through anisotropic turbulence

Toselli

Agrawal

Restaino³

2011

J. Opt. Soc. Am. A

133

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A wealth of experimental data has shown that atmospheric turbulence can be anisotropic; in this case, a Kolmogorov spectrum does not describe well the atmospheric turbulence statistics. In this paper, we show a quantitative analysis of anisotropic turbulence by using a non-Kolmogorov power spectrum with an anisotropic coefficient. The spectrum we use does not include the inner and outer scales, it is valid only inside the inertial subrange, and it has a power-law slope that can be different from a Kolmogorov one. Using this power spectrum, in the weak turbulence condition, we analyze the impact of the power-law variations α on the long-term beam spread and scintillation index for several anisotropic coefficient values ς. We consider only horizontal propagation across the turbulence cells, assuming circular symmetry is maintained on the orthogonal plane to the propagation direction. We conclude that the anisotropic coefficient influences both the long-term beam spread and the scintillation index by the factor ς 2−α .

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Section: Introductionmentioning

confidence: 99%

Light propagation through anisotropic turbulence

Toselli

Agrawal

Restaino³

2011

J. Opt. Soc. Am. A

133

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“…Both locations are in Maryland and are separated by 16.2 km of water. Significant improvements have been made this past year in the facilities' resources which are described elsewhere in this Proceedings (13). Most notably are the new capabilities to enable long term monitoring of atmospheric conditions.…”

Section: Testbedsmentioning

confidence: 99%

Progress in laser propagation in a maritime environment at the Naval Research Laboratory

et al. 2005

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In this paper, we summarize progress in free space laser propagation research at the U.S. Naval Research Laboratory, specifically in the context of propagating and detecting signals through the atmosphere in a maritime environment. Transmission through the atmosphere over large bodies of water presents different challenges than transmission through the atmosphere over land. Our paper reports some of these findings as well as progress in our collaborative efforts to mitigate turbulence to enhance our data links.

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“…Previously, results have been reported on our round trip propagation results, where an array of 25 solid retroreflectors located on a tower on NRL-Tilghman Island, MD folded the optical link back to the CBD facility on the western side of the Chesapeake Bay [15][16][17][18][19][20] . The conversion to a one-way propagation path allows for a more accurate characterization of the path because the angle-of-arrival and C n 2 measurements are made along one direction.…”

Section: Lasercom Test Facilitymentioning

confidence: 99%

“…These thermal gradients change on a time scale of several minutes to hours, depending on the weather conditions. [14][15][16][17] The output of the communication receiver (APD #3) is used for BER testing, packet error rate (PER) testing or video transmission. Details of the test setups and comparisons of BER and PER testing have been presented previously in reference 20.…”

Section: Lasercom Test Facilitymentioning

confidence: 99%

Large diameter high-speed InGaAs receivers for free-space lasercom

Burris

Ferraro²,

Moore

et al. 2007

SPIE Proceedings

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The U. S. Naval Research Laboratory (NRL) and OptoGration, Inc. have collaborated in the development and testing of large area, high speed InGaAs avalanche photodiode (APD) receivers for use in free-space lasercom systems. A 200 micron diameter InGaAs APD receiver has been tested in a free-space lasercom testbed and has demonstrated sensitivities of -42.4 dBm at 622 Mbps and -44.8 dBm at 155 Mbps. A 100 micron diameter receiver has been tested with a resulting sensitivity of -35.75 dBm at 2.4883 Gbps. These receivers are made possible due to OptoGration's capability to manufacture a large area, high speed InGaAs APD with an effective ionization ratio of < 0.2 and by matching the APD device with an appropriate transimpedance amplifier and limiting amplifier. Development and testing of the APD receivers will be described below.

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Overview of NRL's maritime laser communication test facility

Cited by 10 publications

References 10 publications

Light propagation through anisotropic turbulence

Light propagation through anisotropic turbulence

Progress in laser propagation in a maritime environment at the Naval Research Laboratory

Large diameter high-speed InGaAs receivers for free-space lasercom

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