Lossless light projection

Glückstad, Jesper; Lading, Lars; Toyoda, Haruyoshi; Hara, Tsutomu

doi:10.1364/ol.22.001373

Cited by 50 publications

(18 citation statements)

References 4 publications

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“…10 This efficiency is a major benefit for multiple particle manipulation by optical trapping because the total power of the laser source is divided into several trapping beams. In our current setup, power losses are mainly attributed to optical components with mismatched anti-reflection coatings, i.e.…”

Section: Resultsmentioning

confidence: 99%

Interactive light-powered lab-on-a-chip: simultaneous actuation of microstructures by optical manipulation

et al. 2003

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We demonstrate the flexibility of a multiple-beam trapping system that enables interactive manipulation of fluid-borne colloidal structures with advanced controllability and versatility that can lead to light-powered microdevices performing multiple functions in a 'lab-on-a-chip'. A straightforward phase-imaging operation forms the basis for the efficient generation of arbitrarily shaped trapping beam configurations. The multiple-beam trapping pattern is a direct map of the phase variation encoded on a programmable phase-only spatial light modulator (SLM). A graphical user interface that encodes desired phase patterns onto the SLM enables interactive and independent control over the dynamics and geometry of each trapping beam. Experimental results show that the system can be used for guided assembly of particles in a plane, control of particle stacking along a beam axis, and real-time sorting of inhomogeneous mixtures of microspheres. These experiments illustrate that multiple beams generated by the system can be utilized not only for the improved synthesis of functional microstructures but also for their non-contact and parallel actuation crucial for sophisticated microfluidic-based lab-on-a-chip demonstrations in the future.

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Section: Resultsmentioning

confidence: 99%

Interactive light-powered lab-on-a-chip: simultaneous actuation of microstructures by optical manipulation

et al. 2003

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“…With its primary use on beam shaping instead of sample imaging, GPC emphasizes the e cient conversion of the phase input patterns into output intensity patterns. Subsequent to the initial proposal of using GPC in image projection [57] and its experimental demonstration for the e cient projection of binary images [58], GPC has been successfully developed and shown to be a viable dynamic projection technology, especially for real-time interactive micro-manipulation [4]. GPC can project grayscale lattices [59] and is suitable for e cient laser projection of grayscale non-periodic patterns and images [60,61].…”

Section: Generalized Phase Contrast (Gpc)mentioning

confidence: 99%

Light Shaping with Holography, GPC and Holo-GPC

Bañas¹,

Glückstad²

2017

Optical Data Processing and Storage

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Light shaping techniques based on phase-only modulation o er multiple advantages over amplitude modulation. This review examines and compares the merits of two phase modulation techniques; phase-only computer generated holography and Generalized Phase Contrast (GPC). Both techniques are brie y presented while recent developments in GPC will also be covered. Furthermore, novel hybrid schemes that inherit merits from both holography and GPC are also covered. In particular, our most recent technique coined "Holo-GPC" will be discussed in addition to earlier hybrid techniques. We will discuss how Holo-GPC utilizes the simplicity of GPC in forming well-de ned speckle-free shapes and the versatility of holography in distributing these shaped beams over an extended 3D volume. To conclude, we cite applications where the combined strengths of the two photon-e cient phase-only light shaping techniques open new possibilities.

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“…By projecting intensity images that visualize phase inputs, the GPC is a fairly straightforward technique with a high light utilization [18]. It can generate a wide variety of patterns [7,[19][20][21] and accommodates various illumination profiles [7,22,23].…”

Section: Generalized Phase Contrastmentioning

confidence: 99%

GPC light shaping a supercontinuum source

Kopylov¹,

Bañas²,

Villangca³

et al. 2015

Opt. Express

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Generalized Phase Contrast (GPC) is a versatile tool for efficiently rerouting and managing photon energy into speckle-free contiguous spatial light distributions. We have previously shown theoretically and numerically that a GPC Light Shaper shows robustness to shift in wavelength and can maintain both projection length scale and high efficiency over a range [0.75λ 0 ; 1.5λ 0 ] with λ 0 as the characteristic design wavelength. With this performance across multiple wavelengths and the recent availability of tabletop supercontinuum lasers, GPC light shaping opens the possibility for creatively incorporating various multi-wavelength approaches into spatially shaped excitations that can enable new broadband light applications. We verify this new approach using a supercontinuum light source, interfaced with a compact GPC light shaper. Our experiments give ~70% efficiency, ~3x intensity gain, and ~85% energy savings, limited, however, by the illumination equipment, but still in very good agreement with theoretical and numerical predictions. 974-978 (1999).

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Lossless light projection

Cited by 50 publications

References 4 publications

Interactive light-powered lab-on-a-chip: simultaneous actuation of microstructures by optical manipulation

Interactive light-powered lab-on-a-chip: simultaneous actuation of microstructures by optical manipulation

Light Shaping with Holography, GPC and Holo-GPC

GPC light shaping a supercontinuum source

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