Active tracking lasers for precision target stabilization

Riker, Jim F.

doi:10.1117/12.488673

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…It is well known that traditional ATP systems based on the mechanical mirrors and gimbals are complex and expensive, with relatively large volumes and high weight. For the traditional ATP systems, beam steering and stabilizing are still major limitations [4]. However, optical phased array techniques can avoid these problems effectively.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of beam pointing system based on liquid crystal optical phase array

2016

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Abstract:In this paper, we propose and demonstrate an elementary non-mechanical beam aiming and steering system with a single liquid crystal optical phase array (LC-OPA) and charge-coupled device (CCD). With the conventional method of beam steering control, the LC-OPA device can realize one dimensional beam steering continuously. An improved beam steering strategy is applied to realize two dimensional beam steering with a single LC-OPA. The whole beam aiming and steering system, including an LC-OPA and a retroreflective target, is controlled by the monitor. We test the feasibility of beam steering strategy both in one dimension and in two dimension at first, then the whole system is build up based on the improved strategy. The experimental results show that the max experimental pointing error is 56 rad, and the average pointing error of the system is 19 rad.

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Section: Introductionmentioning

confidence: 99%

Experimental analysis of beam pointing system based on liquid crystal optical phase array

2016

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“…The laser is arguably one of the greatest technological achievements. In a nonexhaustive list modern laser technology has allowed for: high precision materials processing and micromachining [1], fast motion tracking and remote sensing methods (lidar) [2], precision length measurements, image and bar-code scanning, data storage [3], medical techniques such as cornea correction [4], and advances in both macroscopic and subatomic research [5]. In the current era it is hard to imagine life without laser devices.…”

Section: Ultrafast Lasersmentioning

confidence: 99%

Adaptive shaping of laser beams for high-harmonic generation applications

Heath¹

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This thesis explores the use of adaptive optics to create tailored laser profiles to drive the process of high-order harmonic generation (HHG).A deformable mirror controlled by a genetic, simulated-annealing algorithm (SA), and a genetic-annealing hybrid algorithm (HA) have been used to create super-Gaussian intensity profiles of orders ranging from P = 1 to P = 2 using a low-powered He-Ne laser. Between these three algorithms it was found that there is a compromise between the algorithm performance and reliability, and the algorithm complexity.Simulated super-Gaussian beam-shaping with a phase-only SLM has been performed with a SA and HA algorithm and compared to a known π-shift method. The HA has shown an improvement in super-Gaussian quality for high orders, P ≈ 2.6.Simulations of HHG driven by super-Gaussian driver fields have been made using both the simple dipole model and the strong field approximation. It has been shown that HHG beam divergence decreases with increased order P . The fringe visibility has also been calculated as a measure of coherence.

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Moment-matching method for extracting beam jitter and boresight in experiments with satellites of small physical cross section

Gudimetla

Riker

2007

Appl. Opt.

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The boresight and atmospheric jitter errors in a satellite tracking experiment are currently estimated by matching the probability density function (PDF) of the received signal counts with a set of PDFs of the signal for several combinations of jitter and boresight errors and then the best choice of jitter and boresight error is accepted via the chi-square test. Here a technique that can estimate atmospheric beam jitter and boresight error directly in a satellite active tracking experiment using the moments of the returns off the satellites is proposed. That is, we use the theoretical PDF for the signal return from a small target and compute the corresponding theoretical PDF moments. We can then form a few equations from these moments with only two unknowns, namely, the jitter and boresight. Solving for the unknowns is then unambiguous and very rapid. The method is valid for small physical cross-section targets and has been verified by using simulation and experimental data. Extending the case to asymmetric jitter and asymmetric boresight is possible.

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Active tracking lasers for precision target stabilization

Cited by 4 publications

References 8 publications

Experimental analysis of beam pointing system based on liquid crystal optical phase array

Experimental analysis of beam pointing system based on liquid crystal optical phase array

Adaptive shaping of laser beams for high-harmonic generation applications

Moment-matching method for extracting beam jitter and boresight in experiments with satellites of small physical cross section

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