Near the ground laser communication system: Fried parameter estimation from the WFS measurements

Sergeyev, Aleksandr; Roggemann, Michael C.; Demars, Casey

doi:10.1109/aero.2010.5446897

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…These data ware analyzed and presented to the research community. 2 In Phase III we concentrated our attention on describing the statistical effects of the turbulence using PSF measurements and comparing our findings with the results obtained from the WFS data. Using our preliminary findings we conclude that the entire system performs reliably and generates trustworthy results.…”

Section: Discussion and Future Workmentioning

confidence: 91%

Near the ground laser communication system: anisoplantic studies based on the PSF measurements

2011

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Near the ground laser communication systems must operate in the presence strong atmospheric turbulence. To model the performance of a laser communication system operating in the real world we have developed an outdoor 3.2 km, partially over water, turbulence measurement and monitoring communication link. The transmitter side is equipped with the laser and the bank of 20 horizontally, in-line mounted light emitting diodes. The receiver side consists of two channels used for wavefront sensor and point spread function measurements. The effects of anisoplanatism on the point spread function and statistics of Fried parameter r 0 are discussed in this article.

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Section: Discussion and Future Workmentioning

confidence: 91%

Near the ground laser communication system: anisoplantic studies based on the PSF measurements

2011

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“…CROSS COUPLING ESTIMATION By definition, cross coupling causes the motion of one axis to induce motion in the other axis. As a result, the response of the coupled model in (2) differs from that of the individual axis models in (1). The proposed estimation process utilizes the response differences to compute a realtime (if desired) estimate of the cross coupling coefficients K DH and K HD in (2).…”

Section: Transient Responsementioning

confidence: 99%

“…As a result, the response of the coupled model in (2) differs from that of the individual axis models in (1). The proposed estimation process utilizes the response differences to compute a realtime (if desired) estimate of the cross coupling coefficients K DH and K HD in (2). To properly estimate the cross coupling, the operating state of the FSM system must be defined.…”

Section: Transient Responsementioning

confidence: 99%

“…The FSM model in (2) was used to generate the simulated beam position with 0.591 ] and 1300 n Z rad/s and for all possible pairs of cross-coupling coefficients ranging from -0.3 to 0.3 in steps of 0.025 but excluding 0. The six disturbance frequencies were evenly spaced between 5 to 30 Hz.…”

Section: Numerical Verificationmentioning

confidence: 99%

“…HE rejection of vibration disturbances presents a challenging problem with many applications including optical beam communications [1,2], osteotomy (bone cutting) [3], optical beam jitter control [4][5][6][7][8], and active noise control [9]. In the beam applications, the desired performance depends on the accurate delivery of power to a target.…”

Section: Introductionmentioning

confidence: 99%

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Cross-coupling estimation for optical beam stabilization

O’Brien

Watkins

Thorp

2012

2012 American Control Conference (ACC)

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This paper presents a real-time algorithm for estimating the cross-coupling coefficients in a fast-steering mirror that serves as the actuator for an optical beam stabilization system. The algorithm computes the crosscoupling coefficients estimates by comparing the measured beam position with the predicted beam position from the uncoupled system model. This algorithm provides a means for estimating the relative orientation between the beam source platform and target platform as well. The algorithm is verified using experimental data from the United States Naval Academy Directed Energy Laboratory. 1 The noise margin is defined as the difference (in dB) between the largest amplitude of the identified tones and the largest amplitude at the frequencies above the tonal frequencies [5].

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