Adaptive wavefront shaping with liquid crystals

Love, Gordon D.; Fender, Janet S.; Restaino, Sergio R.

doi:10.1364/opn.6.10.000016

Cited by 37 publications

(15 citation statements)

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“…The focal points of these groups are in USA [1][2][3][4][5][6][7], Europe [8][9][10][11][12], and Japan [13]. The reasons behind the use of LC for wavefront control are several.…”

Section: Introductionmentioning

confidence: 99%

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Liquid crystal technology for adaptive optics: an update

Restaino

Payne²,

Baker³

et al. 2003

SPIE Proceedings

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The idea of using liquid crystal devices as an adaptive optics component has been proposed by several authors. In recent years a vigorous research effort has been carried out, and it is still flourishing, in several countries. Mainly the research and experimental work has been concentrated in the USA, U.K. and Russia. There are several reasons why liquid crystals may represent a valid alternative to the traditional deformable mirror technology that has been used for the past two decades or so. The main attractiveness of LC resides in the cost. Current deformable mirror technology has a range of price going from $2K to $15K per channel. LC technology promises to be at least a couple of orders of magnitude cheaper. Other reasons are connected with reliability, low power consumption and with a huge technological momentum based on a wide variety of industrial applications. In this paper we present some preliminary characterizations of a new, large format device. Such devices have the potential for extremely high-resolution wave-front control due to the over 10,000 corrective elements. The characterization of the device, so far, consists of measurements of the overall optical quality and of the phase control relationship.Liquid Crystal Materials, Devices, and Applications IX, Liang-Chy Chien, Editor, SPIE-IS&T Electronic Imaging, SPIE Vol. 5003 (2003)

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“…The focal points of these groups are in USA [1][2][3][4][5][6][7], Europe [8][9][10][11][12], and Japan [13]. The reasons behind the use of LC for wavefront control are several.…”

Section: Introductionmentioning

confidence: 99%

“…One way to obviate this problem is to manufacture a device with two orthogonal layers of the same LC material 3 . The phase modulation that can be induced by an LC cell is given by…”

Section: Introductionmentioning

confidence: 99%

Liquid crystal technology for adaptive optics: an update

Restaino

Payne²,

Baker³

et al. 2003

SPIE Proceedings

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“…The amplitude of an optical wave front can be directly controlled using absorbing elements such as a liquid crystal TV [5]. Unfortunately, absorbing elements are inefficient in their use of light, and are inappropriate for high power laser applications because the power densities involved would destroy any absorbing element.…”

Section: Introductionmentioning

confidence: 99%

Correcting for amplitude effects in laser beam propagation through the turbulent atmosphere using a two-deformable-mirror technique

Roggemann¹,

Lee²

1997

SPIE Proceedings

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A two deformable mirror concept for correcting amplitude effects in laser beam projection through the turbulent atmosphere is presented. This system uses a deformable mirror and a Fourier transforming mirror to adjust the amplitude of the wave front in the telescope pupil. A second deformable mirror is used to correct the phase of the wave front before it leaves the aperture. The phase applied to the deformable mirror used for controlling the beam amplitude is obtained using a technique based on the Fienup phase retrieval algorithm. One dimensional simulation results are presented which indicate that the average on-axis energy is improved by 15% or more on average, and the 90% encircled energy radius can be reduced by up to 30% on average.

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“…Phase-distortion correction can be addressed by wavefront conjugation or wavefront control based on system performance metric optimisation [1,2]. Various tools have been developed, including deformable mirrors (DMs) [3], spatial light modulators (SLMs) [4], and MEMS [5]. On the other hand, beam steering is commonly required for target tracking as well as laser pointing.…”

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confidence: 99%