Encoding amplitude information onto phase-only filters

Davis, Jeffrey A.; Cottrell, Don M.; Campos, Juan; Yzuel, María Josefa; Moreno, Ignacio

doi:10.1364/ao.38.005004

Cited by 445 publications

(240 citation statements)

References 28 publications

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“…The beam's complex field amplitude V 0 in Eq. (3) was encoded as a phase-only computer generated hologram (CGH) following the approach reported in [18]. Note that, alternatively to the CGH, the SAB can also be generated by modulating a Gaussian beam with the corresponding even cubic phase function.…”

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confidence: 99%

Symmetric Airy beams

et al. 2014

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In this Letter a new class of light beam arisen from the symmetrization of the spectral cubic phase of an Airy beam is presented. The symmetric Airy beam exhibits peculiar features. It propagates at initial stages with a single central lobe that autofocuses and then collapses immediately behind the autofocus. Then, the beam splits into two specular off-axis parabolic lobes like those corresponding to two Airy beams accelerating in opposite directions. Its features are analyzed and compared to other kinds of autofocusing beams; the superposition of two conventional Airy beams having opposite accelerations (in rectangular coordinates) and also to the recently demonstrated circular Airy beam (in cylindrical coordinates). The generation of a symmetric Airy beam is experimentally demonstrated as well. Besides, based on its main features, some possible applications are also discussed.

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confidence: 99%

Symmetric Airy beams

et al. 2014

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“…The beam complex field amplitude U given by Eq. (7) was encoded as a phase-only computer-generated hologram (CGH) following the approach reported in [15,29]. In our case, the CGH was addressed into a programmable reflective LCoS-SLM (Holoeye LETO, 8-bit 256 gray-levels, pixel pitch of 6.4 μm and 1920×1080 pixels) calibrated for a 2π phase shift at the wavelength λ = 532 nm and corrected from static aberrations, as reported in [30].…”

Section: Resultsmentioning

confidence: 99%

Dual behavior of caustic optical beams facing obstacles

et al. 2017

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A full propagation analysis on both fold-type and cusp-type caustic optical beams under various setups of obstructions is theoretically and experimentally performed. It is demonstrated that the self-healing property of caustic optical beams that include the famous Airy beam is a quite relative property. In fact, fold-type and cusp-type beams cannot only behave as self-healing beams by blocking the main intensity peak, but also behave as self-breaking ones in a nonintuitive manner: by blocking a lateral side of the beam without touching the central intensity peak. The regeneration and rupture processes of caustic beams follow a nonlocal propagation dynamic unlike the other conventional beams. Moreover, deep differences between fold and cusp caustic beams are pointed out once facing certain obstructions. The cusp-caustic beam can be broken down by the obstacle placed in a dark zone outside the caustic region, while the fold-type one remains unaltered. This beam rupture confirms the key role of a hidden propagating field in the shadow region for cusp beams that coexist with the evanescent one. The obtained results cast down the established idea that the Airy beam is a robust self-healing beam since any caustic beam can behave in a dual manner depending on the obstruction location. These facts open up different perspectives for the applications in which the self-healing properties of the beam are relevant.

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“…하지만 현재의 기술로는 진폭과 위상의 변조를 동시에 하는 것은 불가능하기 때문에 진폭변조와 위상변조 중 하나를 이용하여 홀로그램을 구현하고 있다. 두 방법 중 에는 위상변조를 이용하는 방법이 상대적으로 높은 효율성 을 갖는 것으로 알려져 있다 [11][12][13] . 위상변조만을 이용하는 방법은 이상적인 CGH를 계산하고 이를 최적화하는 과정이 필요하다.…”

Section: 서 론unclassified

Novel Optimization Method of Phase-Only Computer-Generated Hologram Using the Phase-Shift Characteristic

Kim¹,

Kim²,

Park³

2016

Korean Journal of Optics and Photonics

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In this study we propose the novel optimization method of the phase-only computer-generated hologram (CGH), to improve calculation speed compared to the conventional method. While the conventional method is calculated using numerical analysis, the novel method is calculated using the phase-shift characteristic of Fourier transformation. In addition, the selectivity of noise filtering lets it decrease the calculation time. The validity of the reconstructed image using the novel method is verified by comparing simulation results to ideal and conventional data, and the improvement of texture and sharpness of the reconstructed image is confirmed by simulation.

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Encoding amplitude information onto phase-only filters

Cited by 445 publications

References 28 publications

Symmetric Airy beams

Symmetric Airy beams

Dual behavior of caustic optical beams facing obstacles

Novel Optimization Method of Phase-Only Computer-Generated Hologram Using the Phase-Shift Characteristic

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