&lt;title&gt;128 x 128 analog liquid crystal spatial light modulator&lt;/title&gt;

Serati, Steven A.; Sharp, Gary D.; Serati, Roylnn A.; McKnight, Douglas J.; Stockley, Jay E.

doi:10.1117/12.205797

Cited by 21 publications

(10 citation statements)

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“…8 This device can update the phase pattern at the rate of 200 Hz and can provide a phase shift of zero to 3π radians individually at each pixel. The pixel pitch is 40 microns, and the fill factor is 60%.…”

Section: Methodsmentioning

confidence: 99%

<title>Optoelectronic Zernike filter for high-resolution wavefront analysis using phase-only liquid crystal spatial light modulator</title>

2000

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ABTRACTAn opto-electronic technique for high-resolution wave-front phase imaging is presented and demonstrated experimentally. The technique is analogous to the conventional Zernike phase-contrast approach, but uses modern spatial light modulator technology to increase robustness and improve performance. Because they provide direct measurements of wave-front phase (rather than wave-front slope measurements, as in Shack-Hartmann sensors), robust phase-contrast sensors have potential applications in high-speed, high-resolution adaptive optic systems. Advantages of the opto-electronic approach over alternative advanced phase-contrast techniques (such as a related phase-contrast sensor which uses a liquid-crystal light valve exhibiting a Kerr-type optical response to perform Fourier filtering) are discussed. The SLM used for the experimental results is a 128×128-element pixilated phase-only liquid crystal spatial light modulator from Boulder Nonlinear Systems, Inc.

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Section: Methodsmentioning

confidence: 99%

<title>Optoelectronic Zernike filter for high-resolution wavefront analysis using phase-only liquid crystal spatial light modulator</title>

2000

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“…The spatial profile of a laser beam can be manipulated by a spatial light modulator (SLM), typically implemented as a liquid crystal display (LCD) or digital micro-mirror devices. The SLMs often take digital signals for control using pulse width modulation, but analog implementations exist 27 potentially requiring again a large set of independent voltages. In the same fashion the spectral and accordingly temporal profile of large bandwidth lasers and frequency combs can be manipulated 28 .…”

Section: Motivationmentioning

confidence: 99%

A scalable, fast, and multichannel arbitrary waveform generator

Baig

Johanning

Wiese

et al. 2013

Review of Scientific Instruments

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This article reports on the development of a multichannel arbitrary waveform generator (MAWG) that simultaneously generates arbitrary voltage waveforms on 24 independent channels with a dynamic update rate of up to 25 Msps. A real-time execution of a single waveform and/or sequence of multiple waveforms in succession, with a user programmable arbitrary sequence order is provided under the control of a stand-alone sequencer circuit implemented using an FPGA. The device is operated using an internal clock and can be synced to other devices by means of transistortransistor logic (TTL) pulses. The device can provide up to 24 independent voltages in the range of up to ± 9 V with a dynamic update-rate of up to 25 Msps and a power consumption of less than 35 W. Every channel can be programmed for 16 independent arbitrary waveforms that can be accessed during run time with a minimum switching delay of 160 ns. The device has a low-noise of 250 µV rms and provides a stable long-term operation with a drift rate below 10 µV/min and a maximum deviation less than ± 300 µV pp over a period of two hours. I. MOTIVATIONIon traps have promising potential in the field of quantum information science [1][2][3][4] , and in particular microstructured Paul traps are well suited for this purpose. They can have multiple zones for trapping, processing and storing of atomic ions 5-9 . Scaling such traps up for quantum information processing requires a large number of independent high bandwidth, low noise voltage signals.In this approach, a register of quantum bits (qubits) is stored in the internal states of laser-cooled trapped ions (forming a Wigner crystal), and in some implementations in motional states of their normal modes 1 . Wigner crystals of increasing length become difficult to cool and to protect against environmental influences and thus are subject to decoherence. This is detrimental for tasks that rely on the computational power of quantum superpositions and entanglement. Splitting the quantum register into crystals of manageable size and entangling them on demand in a quantum network is regarded as a promising and straight-forward solution. This can be achieved in segmented ion traps where storage, shuttling and processing zones 5,10 are realized by a large number of DC electrodes. These type of traps are often regarded as a prerequisite to scalable quantum information processing using trapped ions.Specific implementations of such a partitioned quantum register require shuttling of ions in order to be able to exchange information between independent crystals and this is ideally done with low heating of the motional state 10 . This can be achieved by shuttling of the ions in an adiabatic fashion, at the expense of long shuttling times 11 , or in an tailored diabatic way which can be optimized for low heating 6,12,13 . The latter requires voltages with a fast update rate.Another building block of this type of quantum information processing is splitting and merging strings of a) Electronic mail: wunderlich@physik.uni-siegen.de i...

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“…1d. The wavefront sensor consists of a high-resolution phase SLM, for example a LC-on-silicon chip phase SLM, 4 and a photo-array optically matched to the phase modulator in the sense that both devices have the same size and pixel geometry. The beam splitter in Fig.…”

Section: Opto-electronic Zernike Filtersmentioning

confidence: 99%

“…However, the situation is rapidly changing with the upcoming new generation of wavefront compensation hardware: high-resolution liquid crystal (LC) spatial phase modulators and micro-electromechanical systems (MEMS) containing large arrays of LC cells or micro-mirrors. [1][2][3][4] These new devices can potentially provide wavefront shaping with spatial resolution on the order of 10 4 -10 6 elements. Such resolution is difficult to match with the traditional wavefront sensors used in adaptive optics: lateral shearing interferometer, 5,6 Shack-Hartmann, 7 curvature sensors, 8,9 etc.…”

Section: Introductionmentioning

confidence: 99%

<title>Advanced phase-contrast techniques for wavefront sensing and adaptive optics</title>

2000

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High-resolution phase-contrast wavefront sensors based on optically addressed phase spatial light modulators and micro-mirror/LC arrays are introduced. Wavefront sensor efficiency is analyzed for atmospheric turbulence-induced phase distortions described by the Kolmogorov and Andrews models. A nonlinear Zernike filter wavefront sensor based on an optically addressed liquid crystal phase spatial light modulator is experimentally demonstrated. The results demonstrate high-resolution visualization of dynamically changing phase distortions within the sensor time response of about 10 msec.

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<title>128 x 128 analog liquid crystal spatial light modulator</title>

Cited by 21 publications

References 0 publications

<title>Optoelectronic Zernike filter for high-resolution wavefront analysis using phase-only liquid crystal spatial light modulator</title>

<title>Optoelectronic Zernike filter for high-resolution wavefront analysis using phase-only liquid crystal spatial light modulator</title>

A scalable, fast, and multichannel arbitrary waveform generator

<title>Advanced phase-contrast techniques for wavefront sensing and adaptive optics</title>

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