Progress in high-speed communication at the NRL Chesapeake Bay lasercomm testbed

Vilcheck, Michael J.; Burris, H. R.; Moore, Christopher I.; Stell, Mena F.; Suite, Michele R.; Davis, Mark A.; Mahon, Rita; Oh, Eunha; Scharpf, William J.; Rabinovich, William S.; Reed, Anne E.; Gilbreath, G. C.

doi:10.1117/12.507850

Cited by 11 publications

(12 citation statements)

References 6 publications

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“…Many of the results have been previously reported [1][2][3] . Recently, with the construction of the multi-mode fiber O-E-O receiver, we have begun OC-48 testing in various conditions over our 32 km folded path test range.…”

Section: Ber Testingsupporting

confidence: 60%

Overview of NRL's maritime laser communication test facility

et al. 2005

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NRL has established a 20 mile round trip laser communication test facility across the Chesapeake Bay for investigating lasercomm performance in a maritime environment. Experiments at this facility have successfully demonstrated links at data rates up to 2.5 Gbps and at lower rates in light rain and fog. This facility is currently being upgraded to allow long term monitoring of a one-way 10 mile link across the Bay. Parameters monitored will include BER, turbulence conditions, atmospheric transmission, and meteorological conditions. A summary of past results, the design/status of the upgrade to the test facility, and recent results will be presented.

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Section: Ber Testingsupporting

confidence: 60%

Overview of NRL's maritime laser communication test facility

et al. 2005

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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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“…This monitor, if successful, will enable us to measure the refractive index structure constant, C n 2 , over ranges that exceed a kilometer at a cost that promises to be 1/3 that of presently available commercial products To characterize the channel typical of a maritime environment, we conducted tests sending a 1542 nm modulated laser beam, driven at 622 Mbps, across the bay, to be retroreflected by the array at TI. The bit error rate (BER) of the returned signal was measured and plotted as a function of time [7]. Some of these results are shown in Figure 4.…”

Section: Propagation Conditionsmentioning

confidence: 99%

Research in free-space optical data transfer at the U.S. Naval Research Laboratory

Gilbreath

Rabinovich

2004

SPIE Proceedings

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In this paper, a review of the progress and initiatives in free space optical data transfer and communications at the Naval Research Laboratory is presented. NRL has been investing in research and development in optical communications and laser ranging, both conventional, and advanced. Efforts include developing amplifiers and components for lasers to be used in long range, one-way and retro-reflected links. NRL has been developing Multiple Quantum Well retromodulators for space-based and terrestrial-based applications as well. These include spacecraft-to-spacecraft data links for navigation and communications, intra-bus networks on spacecraft, and optical tagging. Terrestrial applications in the eyesafe regime have led to additional studies in how the atmosphere affects one-way and modulated retroreflected signals in the maritime environment, in particular. New results from retrodiversity experiments, over-the-water propagation studies, and field tests are discussed. INTRODUCTIONThe Naval Research Laboratory (NRL) has been investing in advanced optical data transfer techniques since the 1970's. Recent studies include efforts in optical communications and satellite laser ranging, both conventional and advanced. At this time, NRL has two ongoing 6.2 programs in optical communications and tagging. These programs address high data rate links -tens of gigabits per second (Gbps) -and passive optical terminals based on Multiple Quantum Well (MQW) retromodulators which operate at megabits per second (Mbps) [1][2][3]. NRL also supports a dual interrogator program for retromodulator data links administered through the Office of Naval Research (ONR), as well as perform as SBIR advisors for advanced optical communications applications serving Navy needs. NRL's goals for these programs are to demonstrate feasibility and conduct engineering science in device development and atmospheric effects as they pertain to data links in the near infrared. To achieve these goals, investigations are ongoing in device and technology development, in techniques, such as forward adaptive error correction, and in atmospheric propagation. Figure 1 shows a break out of technologies and techniques explored as a function of data rate. This paper summarizes progress in these areas at NRL.It should be noted that the NRL has a satellite laser ranging site located on the east coast which offers a 1 meter telescope, 3 Watt 1.06 micron laser which has a pulse repetition frequency of 10 Hz. This paper will not address progress at the facility but details are available in the references [4,5]. Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters ...

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Progress in high-speed communication at the NRL Chesapeake Bay lasercomm testbed

Cited by 11 publications

References 6 publications

Overview of NRL's maritime laser communication test facility

Overview of NRL's maritime laser communication test facility

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

Research in free-space optical data transfer at the U.S. Naval Research Laboratory

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