10 results on '"Aline N. Dinkelaker"'
Search Results
2. Astrophotonics: introduction to the feature issue
- Author
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Michael J. Ireland, Philippe Feautrier, Aashia Rahman, Joss Bland-Hawthorn, Faustine Cantalloube, Simon Ellis, Lucas Labadie, Robert R. Thomson, and Aline N. Dinkelaker
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Very Large Telescope ,business.industry ,Computer science ,Astrophysics::Instrumentation and Methods for Astrophysics ,Statistical and Nonlinear Physics ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Astronomical instrumentation ,010309 optics ,Interferometry ,Optics ,Feature (computer vision) ,0103 physical sciences ,Electrical and Electronic Engineering ,Photonics ,Telecommunications ,business ,Adaptive optics ,Engineering (miscellaneous) - Abstract
Astrophotonics is an emerging field that focuses on the development of photonic components for astronomical instrumentation. With ongoing advancements, astrophotonic solutions are already becoming an integral part of existing instruments. A recent example is the €60M ESO GRAVITY instrument at the Very Large Telescope Interferometer, Chile, that makes heavy use of photonic components. We envisage far-reaching applications in future astronomical instruments, especially those intended for the new generation of extremely large telescopes and in space. With continued improvements in extreme adaptive optics, the case becomes increasingly compelling. The joint issue of JOSA B and Applied Optics features more than 20 state-of-the-art papers in diverse areas of astrophotonics. This introduction provides a summary of the papers that cover several important topics, such as photonic lanterns, beam combiners and interferometry, spectrographs, OH suppression, and coronagraphy.
- Published
- 2021
3. Space-borne Bose–Einstein condensation for precision interferometry
- Author
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Hauke Müntinga, Jens Grosse, Wolfgang P. Schleich, Patrick Windpassinger, Klaus Sengstock, Wolfgang Ertmer, Tobias Franz, Hannes Duncker, Thijs Wendrich, Achim Peters, Vladimir Schkolnik, Dennis Becker, Anja Kohfeldt, Claus Lämmerzahl, Eric Charron, Benjamin Weps, Robin Corgier, Maik Erbe, Waldemar Herr, André Kubelka-Lange, Naceur Gaaloul, Ortwin Hellmig, Stephan Seidel, Manuel Popp, Maike D. Lachmann, Aline N. Dinkelaker, Claus Braxmaier, Reinhold Walser, Andreas Wicht, André Wenzlawski, Daniel Lüdtke, Holger Ahlers, Markus Krutzik, Ernst M. Rasel, and Sirine Amri
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Atomic Physics (physics.atom-ph) ,FOS: Physical sciences ,Space (mathematics) ,01 natural sciences ,Physics - Atomic Physics ,law.invention ,010309 optics ,law ,Laser cooling ,0103 physical sciences ,Astronomical interferometer ,010306 general physics ,Quantum ,Condensed Matter::Quantum Gases ,Physics ,Multidisciplinary ,Bragg's law ,interferometry ,Bose-Einstein ,Computational physics ,Interferometry ,Quantum Gases (cond-mat.quant-gas) ,Quasiparticle ,Atomic physics ,Condensed Matter - Quantum Gases ,Bose–Einstein condensate - Abstract
Space offers virtually unlimited free-fall in gravity. Bose-Einstein condensation (BEC) enables ineffable low kinetic energies corresponding to pico- or even femtokelvins. The combination of both features makes atom interferometers with unprecedented sensitivity for inertial forces possible and opens a new era for quantum gas experiments. On January 23, 2017, we created Bose-Einstein condensates in space on the sounding rocket mission MAIUS-1 and conducted 110 experiments central to matter-wave interferometry. In particular, we have explored laser cooling and trapping in the presence of large accelerations as experienced during launch, and have studied the evolution, manipulation and interferometry employing Bragg scattering of BECs during the six-minute space flight. In this letter, we focus on the phase transition and the collective dynamics of BECs, whose impact is magnified by the extended free-fall time. Our experiments demonstrate a high reproducibility of the manipulation of BECs on the atom chip reflecting the exquisite control features and the robustness of our experiment. These properties are crucial to novel protocols for creating quantum matter with designed collective excitations at the lowest kinetic energy scales close to femtokelvins., 6 pages, 4 figures
- Published
- 2018
4. Starlight coupling through atmospheric turbulence into few-mode fibers and photonic lanterns in the presence of partial adaptive optics correction
- Author
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Martin Roth, Kalaga Madhav, Momen Diab, John J. Davenport, and Aline N. Dinkelaker
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FOS: Physical sciences ,Physics::Optics ,Degrees of freedom (mechanics) ,01 natural sciences ,Multiplexing ,law.invention ,010309 optics ,Optics ,law ,0103 physical sciences ,Adaptive optics ,010303 astronomy & astrophysics ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,Physics ,Coupling ,business.industry ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astronomy and Astrophysics ,Starlight ,Space and Planetary Science ,Hybrid system ,Photonics ,business ,Astrophysics - Instrumentation and Methods for Astrophysics ,Waveguide ,Optics (physics.optics) ,Physics - Optics - Abstract
Starlight corrupted by atmospheric turbulence cannot couple efficiently into astronomical instruments based on integrated optics as they require light of high spatial coherence to couple into their single-mode waveguides. Low-order adaptive optics in combination with photonic lanterns offer a practical approach to achieve efficient coupling into multiplexed astrophotonic devices. We investigate, aided by simulations and an experimental testbed, the trade-off between the degrees of freedom of the adaptive optics system and those of the input waveguide of an integrated optic component leading to a cost-effective hybrid system that achieves a signal-to-noise ratio higher than a standalone device fed by a single-mode fiber., 12 pages, 10 figures
- Published
- 2020
5. Ultrafast laser inscription of asymmetric integrated waveguide 3 dB couplers for astronomical K-band interferometry at the CHARA array
- Author
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Robert R. Thomson, Tarun Kumar Sharma, Fraser A. Pike, Aurélien Benoit, Vincent Coudé du Foresto, Ettore Pedretti, N. Scott, T. ten Brummelaar, Kalaga Madhav, Aline N. Dinkelaker, Martin Roth, Abani Shankar Nayak, David Guillaume MacLachlan, and Lucas Labadie
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Materials science ,010504 meteorology & atmospheric sciences ,business.industry ,Physics::Optics ,Statistical and Nonlinear Physics ,Laser ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,law.invention ,CHARA array ,010309 optics ,Interferometry ,Optics ,law ,K band ,0103 physical sciences ,Physics::Accelerator Physics ,Power dividers and directional couplers ,Angular resolution ,business ,Adaptive optics ,Waveguide ,0105 earth and related environmental sciences - Abstract
We present the fabrication and characterization of 3 dB asymmetric directional couplers for the astronomical K-band at wavelengths between 2.0 and 2.4 µm. The couplers were fabricated in commercial Infrasil silica glass using an ultrafast laser operating at 1030 nm. After optimizing the fabrication parameters, the insertion losses of straight single-mode waveguides were measured to be ∼ 1.2 ± 0.5 d B across the full K-band. We investigate the development of asymmetric 3 dB directional couplers by varying the coupler interaction lengths and by varying the width of one of the waveguide cores to detune the propagation constants of the coupled modes. In this manner, we demonstrate that ultrafast laser inscription is capable of fabricating asymmetric 3 dB directional couplers for future applications in K-band stellar interferometry. Finally, we demonstrate that our couplers exhibit an interferometric fringe contrast of > 90 % . This technology paves the path for the development of a two-telescope K-band integrated optic beam combiner for interferometry to replace the existing beam combiner (MONA) in Jouvence of the Fiber Linked Unit for Recombination (JouFLU) at the Center for High Angular Resolution Astronomy (CHARA) telescope array.
- Published
- 2021
6. First stellar photons for an integrated optics discrete beam combiner at the William Herschel Telescope
- Author
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Nazim Ali Bharmal, Jean-Tristan M. Buey, Ettore Pedretti, Roberto Osellame, Martin Roth, Lisa Bardou, Giacomo Corrielli, James Osborn, Lazar Staykov, Simone Piacentini, Abani Shankar Nayak, Eric Gendron, Lucas Labadie, Tarun Sharma, Kalaga Madhav, Mathieu Cohen, Tim Morris, Fanny Chemla, and Aline N. Dinkelaker
- Subjects
Point spread function ,Microlens ,Physics ,business.industry ,Astrophysics::Instrumentation and Methods for Astrophysics ,Laser ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Deformable mirror ,law.invention ,010309 optics ,Interferometry ,Optics ,law ,0103 physical sciences ,William Herschel Telescope ,Speckle imaging ,Electrical and Electronic Engineering ,Altair ,business ,Engineering (miscellaneous) - Abstract
We present the first on-sky results of a four-telescope integrated optics discrete beam combiner (DBC) tested at the 4.2 m William Herschel Telescope. The device consists of a four-input pupil remapper followed by a DBC and a 23-output reformatter. The whole device was written monolithically in a single alumino-borosilicate substrate using ultrafast laser inscription. The device was operated at astronomical H-band (1.6 µm), and a deformable mirror along with a microlens array was used to inject stellar photons into the device. We report the measured visibility amplitudes and closure phases obtained on Vega and Altair that are retrieved using the calibrated transfer matrix of the device. While the coherence function can be reconstructed, the on-sky results show significant dispersion from the expected values. Based on the analysis of comparable simulations, we find that such dispersion is largely caused by the limited signal-to-noise ratio of our observations. This constitutes a first step toward an improved validation of the DBC as a possible beam combination scheme for long-baseline interferometry.
- Published
- 2021
7. Nanosatellites for quantum science and technology
- Author
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Markus Krutzik, Aline N. Dinkelaker, James A. Grieve, Daniel K. L. Oi, Alexander Ling, and Thomas Jennewein
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Physics ,Space technology ,business.industry ,General Physics and Astronomy ,Nanotechnology ,Quantum spacetime ,Space (commercial competition) ,01 natural sciences ,010309 optics ,Secure communication ,0103 physical sciences ,Systems engineering ,Satellite ,010306 general physics ,business ,Quantum information science ,Quantum ,QC ,Quantum computer - Abstract
Bringing quantum science and technology to the space frontier offers exciting prospects for both fundamental physics and applications such as long-range secure communication and space-borne quantum probes for inertial sensing with enhanced accuracy and sensitivity. But despite important terrestrial pathfinding precursors on common microgravity platforms and promising proposals to exploit the significant advantages of space quantum missions, large-scale quantum test beds in space are yet to be realised due to the high costs and lead times of traditional ‘Big Space’ satellite development. But the ‘small space’ revolution, spearheaded by the rise of nanosatellites such as CubeSats, is an opportunity to greatly accelerate the progress of quantum space missions by providing easy and affordable access to space and encouraging agile development. We review space quantum science and technology, CubeSats and their rapidly developing capabilities and how they can be used to advance quantum satellite systems.
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- 2016
8. Autonomous frequency stabilization of two extended cavity diode lasers at the potassium wavelength on a sounding rocket
- Author
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Robert Smol, Vladimir Schkolnik, Ernst M. Rasel, Andreas Wicht, Max Schiemangk, Patrick Windpassinger, André Wenzlawski, Andrew Kenyon, Michele Giunta, Christian Kürbis, Markus Krutzik, Kai Lampmann, Thijs Wendrich, Aline N. Dinkelaker, Christian Deutsch, Achim Peters, and Ortwin Hellmig
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Physics - Instrumentation and Detectors ,Atomic Physics (physics.atom-ph) ,Materials Science (miscellaneous) ,FOS: Physical sciences ,Beat (acoustics) ,01 natural sciences ,Industrial and Manufacturing Engineering ,law.invention ,Physics - Atomic Physics ,010309 optics ,Optics ,law ,0103 physical sciences ,Redundancy (engineering) ,Business and International Management ,Frequency modulation spectroscopy ,010306 general physics ,Diode ,Physics ,Sounding rocket ,business.industry ,Instrumentation and Detectors (physics.ins-det) ,Laser ,Wavelength ,Frequency stabilization ,Atomic physics ,business - Abstract
We have developed, assembled, and flight-proven a stable, compact, and autonomous extended cavity diode laser (ECDL) system designed for atomic physics experiments in space. To that end, two micro-integrated ECDLs at 766.7 nm were frequency stabilized during a sounding rocket flight by means of frequency modulation spectroscopy (FMS) of 39^K and offset locking techniques based on the beat note of the two ECDLs. The frequency stabilization as well as additional hard- and software to test hot redundancy mechanisms were implemented as part of a state-machine, which controlled the experiment completely autonomously throughout the entire flight mission., 10 pages, 7 figures
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- 2016
9. KALEXUS - a Potassium Laser System with Autonomous Frequency Stabilization on a Sounding Rocket
- Author
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Andrew Kenyon, Vladimir Schkolnik, Aline N. Dinkelaker, Max Schiemangk, Achim Peters, Markus Krutzik, and Kalexus Team
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Sounding rocket ,Materials science ,Absorption spectroscopy ,business.industry ,Potassium ,Physics::Optics ,chemistry.chemical_element ,Laser ,01 natural sciences ,law.invention ,010309 optics ,Optics ,chemistry ,law ,Physics::Space Physics ,0103 physical sciences ,Physics::Atomic Physics ,Frequency stabilization ,Laser frequency ,business ,010303 astronomy & astrophysics ,Diode ,Remote sensing - Abstract
Autonomous laser frequency stabilization is a prerequisite for future space-borne atomic physics experiments. The KALEXUS experiment performed frequency stabilization of two 767 nm extended cavity diode lasers onboard the TEXUS 53 sounding rocket.
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- 2016
10. Space-borne frequency comb metrology
- Author
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Christian Deutsch, Theodor W. Hänsch, Vladimir Schkolnik, Ronald Holzwarth, Markus Krutzik, Aline N. Dinkelaker, Andreas Wicht, Max Schiemangk, Patrick Windpassinger, Ortwin Hellmig, Michele Giunta, Olaf Mandel, Hannes Duncker, Andy Thaller, Achim Peters, Matthias Lezius, Kai Lampmann, Anja Kohfeldt, Klaus Sengstock, Thomas Hülsing, and Tobias Wilken
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Synthetic aperture radar ,Physics ,Earth observation ,Sounding rocket ,Orders of magnitude (temperature) ,business.industry ,Physics::Optics ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Metrology ,010309 optics ,Frequency comb ,Optics ,Physics::Space Physics ,0103 physical sciences ,Satellite ,Satellite navigation ,0210 nano-technology ,business - Abstract
Precision time references in space are of major importance to satellite-based fundamental science, global satellite navigation, earth observation, and satellite formation flying. Here we report on the operation of a compact, rugged, and automated optical frequency comb setup on a sounding rocket in space under microgravity. The experiment compared two clocks, one based on the optical D2 transition in Rb, and another on hyperfine splitting in Cs. This represents the first frequency comb based optical clock operation in space, which is an important milestone for future satellite-based precision metrology. Based on the approach demonstrated here, future space-based precision metrology can be improved by orders of magnitude when referencing to state-of-the-art optical clock transitions.
- Published
- 2016
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