OpticsInfoBase

Remove Optical Vortices Using Continuous Phase Modulation

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThA1
• OSA Technical Digest (CD)
• Chen, Mingzhou; Dainty, Chris
• We introduce a method to remove optical vortices from strong scintillated laser beams by vortex dipole annihilation with a continuous phase modulation. Numerical ...

Experimental Validation of LTAO and MCAO Configurations with Optimal Control

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThA2
• OSA Technical Digest (CD)
• Costille, Anne; Petit, Cyril; Conan, Jean-Marc; Kulcsár, Caroline; Raynaud, Henri-Francois; Fusco, Thierry
• We present an experimental validation of LTAO and MCAO concepts in closed-loop in laboratory. We compare the performance of LQG based optimal control and classic integrator based...

Building an Open Loop Interaction Matrix for VOLT

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThA4
• OSA Technical Digest (CD)
• Andersen, David R; Fischer, Michael; Véran, Jean-Pierre
• We explore a method for building an interaction matrix for VOLT (the Victoria Open Loop Testbed) that bypasses problems associated with optically aligning an open loop wavefront sensor...

Thermal Compensation in the LIGO Gravitational-Wave Interferometers

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThA5
• OSA Technical Digest (CD)
• Willems, Phil
• Gravitational-wave (GW) interferometers, such as LIGO, are susceptible to thermal aberrations that impair their performance. We describe thermal compensation in the LIGO GW...

A Calibration Unit for the Rayleigh Laser Guide Stars at the LBT

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThA6P
• OSA Technical Digest (CD)
• Schwab, Christian; Quirrenbach, Andreas; Gässler, Wolfgang; Peter, Diethard
• We describe the calibration scheme and optical design of a calibration unit for the off-axis laser guide stars at LBT’s ARGOS facility. Artificial stars with the desired wavefront are...

An Auto-Regressive Model to Create Seeing Time Series

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThB1
• OSA Technical Digest (CD)
• Herriot, Glen; Ellerbroek, Brent L; Andersen, David A; Schoeck, Matthias; Travouillon, Tony
• We present an auto-regressive model of atmospheric seeing versus time, based on three years’ data from TMT candidate site Cerro Armazonas. The model reproduces time histories of...

Optimization of cw and Pulsed Sodium Guide Star Lasers

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThB3P
• OSA Technical Digest (CD)
• Holzlohner, Ronald; Rochester, Simon; Bonaccini Calia, Domenico; Budker, Dmitry; Higbie, James M; Hackenberg, Wolfgang
• We present the results of extensive Bloch equation numerical simulations, both for cw and for various pulsed laser formats and applications.

A Linear Model for Shack-Hartmann Sensors

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThC1
• OSA Technical Digest (CD)
• Ellerbroek, Brent L
• We describe a linear model for Shack-Hartmann sensors. For small wave-front aberrations, the model accounts for the effects of physical optics, extended sources, pixel sampling, and...

New Modal Wavefront Sensing Employing Binary Basis Functions

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThC2
• OSA Technical Digest (CD)
• Wang, Feiling; Spivey, Christopher; Zhong, Guixiong; Chen, Yuchuan; Zhao, Jing
• Recently, a modal wavefront sensing method, with the use of binary basis functions, was proposed. In this paper we examine some of the optical arrangements for its applications and...

Scene Based Wavefront Sensing for Figure Control of Airborne and Space Optics

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThC4
• OSA Technical Digest (CD)
• Wirth, Allan; Jankevics, Andrew; Landers, Frank
• Correlation wavefront sensing is applied to the problem of figure and alignment maintenance of imaging systems on airborne and space platforms. The design of the system and results of...

Data Compression for Nearly-Periodic Data

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThC5
• OSA Technical Digest (CD)
• Talmi, Amos; Ribak, Erez N
• Shape from shade and Hartmann sensing require plenty of pixels for measurement, but many fewer can be analyzed, saving space and time. We found a method to compress large-format camera...

MEMS Wavefront Correctors

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThD1
• OSA Technical Digest (CD)
• Bifano, Thomas
• Deformable mirrors made using MEMS processes have become commodity products. Newer capabilities include nanometer-scale predictive open-loop control and scaling to >4000 actuators,...

Optically Addressed MEMS Coupled Photodetector Spatial Light Modulator

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThD2
• OSA Technical Digest (CD)
• Haji-Saeed, Bahareh; Khoury, Jed; Vaccaro, Kenneth; Kierstead, John; Woods, Charles; Davis, Andrew
• We are in the process of developing an all optically driven deformable mirror device through integration of an array of photodetectors with an array of MEMS deformable mirrors.

Piezo Array Deformable Mirrors and New Associated Technologies: Spherical Shape and Tip/Tilt Mount

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThD3
• OSA Technical Digest (CD)
• Sinquin, Jean-Christophe; Lurçon, Jean-Marie; Morin, Pierre
• We recall the principles, performances and main technical advantages of CILAS Piezo Array Deformable Mirrors. Then we present two new associated technologies: the possible spherical...

Fast, Robust Parameter Estimation and Open-Loop Control of Point-Actuated, Continuous-Facesheet Deformable Mirrors

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOThD4
• OSA Technical Digest (CD)
• Vogel, Curtis R; Tyler, Glenn; Conan, Rodolphe; Blain, Celia
• We introduce robust order N algorithms to estimate model parameters and control DMs in open loop based on the Vogel-Yang model for deformable mirrors appearing in JOSA-A, 23, pp....

A New Sodium Guidestar Adaptive Optics System for the Starfire Optical Range 3.5m Telescope

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOTuA1
• OSA Technical Digest (CD)
• Johnson, Robert; Montera, Dennis; Schneeberger, Timothy; Spinhirne, James
• A new adaptive optics system is being installed on the Starfire 3.5m telescope, using the existing 50W pump to create a sodium guidestar. Transmission to the wavefront sensor is...

High-Resolution Lidar Observations of Mesospheric Sodium and Implications for Adaptive Optics

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOTuA2
• OSA Technical Digest (CD)
• Hickson, Paul; Pfrommer, Thomas
• We describe new observations of sodium density variability obtained with a high-resolution lidar system. These show significant mean altitude variations extending to frequencies above...

ARGOS: The LBT's Laser-Guided Adaptive Optics System

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOTuA3
• OSA Technical Digest (CD)
• Hart, Michael; Rabien, Sebastian; Esposito, Simone; Busoni, Lorenzo
• The Large Binocular Telescope is adding a constellation of Rayleigh laser guide stars to implement ground-layer AO over a 4 arcminute field. A further upgrade will add sodium lasers to...

Laboratory Experiments of Laser Tomographic Adaptive Optics at Visible Wavelengths

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOTuA4
• OSA Technical Digest (CD)
• Ammons, Mark; Johnson, Luke; Gavel, Donald T; Kupke, Renate; Max, Claire E
• We review laboratory experiments of Laser Tomographic Adaptive Optics (LTAO) on a simulated 10-meter telescope testbed at 710 nm. The system maintains 20-35% Strehl across 45” over the...

CANARY: An On-Sky Laser Guide Star Multiple Object AO Demonstrator

• Abstract
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• Adaptive Optics: Methods, Analysis and Applications (AOPT) 2009 paper: AOTuA5
• OSA Technical Digest (CD)
• Morris, Tim; Hubert, Zoltan; Myers, Richard; Gendron, Eric; Longmore, Andy; Rousset, Gerard; Talbot, Gordon; Fusco, Thierry; Dipper, Nigel; Vidal, Fabrice; Henry, David; Gratadour, Damien; Butterley, Tim; Chemla, Fanny; Guzman, Dani; Younger, Eddy; Kellerer, Aglae; Harrison, Mark; Marteaud, Michel; Geng, Deli; Basden, Ali; Guesalaga, Andres; Dunlop, Colin; Todd, Stephen; Dickson, Colin
• CANARY is the on-sky LGS MOAO demonstrator for the proposed EAGLE E-ELT instrument. The CANARY design is described here for the initial experimental phases. Simulations of system...