Showing papers in "Frontiers in Optics in 2010"
TL;DR: In this article, the authors present an intrinsically stable, deterministic implementation of discrete quantum walks with single photons in space, and explore the quantum-to-classical transition by introducing tunable decoherence.
Abstract: We present an intrinsically stable, deterministic implementation of discrete quantum walks with single photons in space. We measure walks with up to 6 steps and explore the quantum-to-classical transition by introducing tunable decoherence.
154 citations
TL;DR: In this article, the spin-orbit interaction of light is used to translate subwavelength information to the polarization distribution of the output light, and they observe sensitive angular momentum conversion and spin-Hall effect of light.
Abstract: Optical microscopy of a nanoparticle is accompanied by spin-orbit interaction of light which translates subwavelength information to the polarization distribution of the output light. We observe sensitive angular momentum conversion and spin-Hall effect of light.
47 citations
TL;DR: SLIM as discussed by the authors is a new optical method measuring optical pathlength changes of 0.3 nm spatially and 0.03nm temporally, combining two classic ideas in light imaging: Zernike's phase contrast microscopy and Gabor's holography.
Abstract: We present SLIM, a new optical method measuring optical pathlength changes of 0.3 nm spatially and 0.03nm temporally. SLIM combines two classic ideas in light imaging: Zernike’s phase contrast microscopyand Gabor’s holography.
42 citations
TL;DR: In this article, the authors outline hardware used to make large scale entangled states, using atoms and light, which can store entangled superpositions of information, offering the possibility of enhanced performance in many applications.
Abstract: Quantum systems can store entangled superpositions of information, offering the possibility of enhanced performance in many applications. This talk will outline hardware used to make large scale entangled states, using atoms and light.
30 citations
TL;DR: In this article, the spin and orbital angular momenta of a non-paraxial monochromatic electromagnetic field were calculated via fine splitting of caustics, showing that the orbital angular momentum has a polarization-dependent contribution describing the spin-orbit interaction.
Abstract: We calculate the spin and orbital angular momenta of a non-paraxial monochromatic electromagnetic field. The orbital angular momentum has a polarization-dependent contribution describing the spin-orbit interaction. This can be observed via fine splitting of caustics.
28 citations
TL;DR: In this article, the authors highlight an electronic textbook available free of charge in PDF format at optics.byu.edu with the target audience being upper-division physics undergraduates, which they describe as:
Abstract: We highlight an electronic textbook available free of charge in PDF format at optics.byu.edu. The target audience is upper-division physics undergraduates.
27 citations
TL;DR: It is shown that when the coherence length of the incident field is comparable to, or is smaller than, the radius of the sphere, the angular distribution of the radiant intensity depends strongly on the degree of coherence.
Abstract: We study the effects of spatial coherence of the incident beam on the scattering by a sphere. Strong modifications of the radiant intensity are predicted.
18 citations
TL;DR: In this paper, the authors report on the observation of two-photon absorption using tapered fibers in rubidium vapor at power levels of less than 150 nW, where the fibers have sub-wavelength diameters.
Abstract: Nonlinear optical effects can be enhanced in tapered fibers with sub-wavelength diameters. Here we report on the observation of two-photon absorption using tapered fibers in rubidium vapor at power levels of less than 150 nW.
17 citations
TL;DR: In this article, laser operation was achieved in microstructured channel waveguides of WO4)2:Gd3+, Lu3+, Yb3+, resulting in a threshold of only 5 mW, a slope efficiency of 62% versus launched pump power, and 76 mW output power.
Abstract: Laser operation was achieved in microstructured channel waveguides of KY(WO4)2:Gd3+, Lu3+, Yb3+, resulting in a threshold of only 5 mW, a slope efficiency of 62% versus launched pump power, and 76 mW output power.
15 citations
TL;DR: In this article, four co-propagating optical channels of same wavelength have been spatially multiplexed and de-multiplexed over a step index multimode silica fiber to quadruple the bandwidth.
Abstract: Four co-propagating optical channels of same wavelength have been spatially multiplexed and de-multiplexed over a step index multimode silica fiber to quadruple the bandwidth. This presents experimental setup and results for such a system.
15 citations
TL;DR: In this paper, photorefractive two-wave mixing gain was used for coherent amplification in digital holography, which enables the reconstruction of amplitude and phase images that are not detectable otherwise, leading to an enhanced dynamic range.
Abstract: We use photorefractive two-wave mixing gain for coherent amplification in digital holography. This enables the reconstruction of amplitude and phase images that are not detectable otherwise, leading to an enhanced dynamic range.
TL;DR: In this paper, a compressive-sensing approach for obtaining an N-point Fourier spectrum using much less than N time-domain measurements is described, and the authors experimentally resolve sparse vibrational spectra using <30% of the Nyquist limit samples in single-pulse CARS experiments.
Abstract: We describe a compressive-sensing approach for obtaining an N-point Fourier spectrum using much less than N time-domain measurements. We experimentally resolve sparse vibrational spectra using <30% of the Nyquist limit samples in single-pulse CARS experiments.
TL;DR: An optical design that retrofits a cell phone display and an interactive software for assessing refractive properties of human eyes and an average error of ~0.5 diopters is described.
Abstract: We describe an optical design that retrofits a cell phone display and an interactive software for assessing refractive properties of human eyes. User evaluation revels an average error of ~0.5 diopters using currently available phones.
[...]
TL;DR: When placed in a uniform stream of light, an airfoil shaped refractive object may experience a transverse lift force having a large lift angle with respect to the forward scattering force as mentioned in this paper.
Abstract: When placed in a uniform stream of light, an airfoil shaped refractive object may experience a transverse lift force having a large lift angle with respect to the forward scattering force.
TL;DR: In this article, the phase difference associated with a defocused wavefront can be determined from a single color image using two-dimensional fast Fourier transform solvers, which can be used to infer information about objects in the path of the wavefront.
Abstract: Phase differences associated with a defocused wavefront can be determined from a single color image. The color image, which is a measurement of intensity as a function of wavelength, is used to calculate the change in intensity with respect to wavelength over the image plane. The change in intensity can then be used to estimate a phase difference associated with the defocused wavefront using two-dimensional fast Fourier transform solvers. The phase difference can be used to infer information about objects in the path of the defocused wavefront. For example, it can be used to determine an object's shape, surface profile, or refractive index profile. It can also be used to calculate path length differences for actuating adaptive optical systems. Compared to other techniques, deriving phase from defocused color images is faster, simpler, and can be implemented using standard color filters.
TL;DR: Art Ashkin and his many accomplishments are discussed in this article, where the author will reminisce about the man and their many accomplishments, including his many achievements in the field of computer graphics.
Abstract: I am fortunate to have worked closely with Art Ashkin for many years. In this talk I will reminisce about the man and his many accomplishments.
TL;DR: In this paper, the authors review the technology, practical challenges and main applications of Raman distributed temperature sensing and discuss recent developments in system performance and reliability in harsh environments are also discussed.
Abstract: The paper reviews the technology, practical challenges and main applications of Raman distributed temperature sensing and discusses recent developments in system performance and reliability in harsh environments are also discussed.
TL;DR: FanFan-out as mentioned in this paper is a fan-out device that connects a 120 core multicore fiber to a linear waveguide array, enabling interfacing of multicore fibers to diffraction limited slits (e.g. arrayed waveguide gratings) for astrophotonic spectroscopy.
Abstract: A fan-out device is presented which connects a 120 core multicore fiber to a linear waveguide array. This technology enables interfacing of multicore fibers to diffraction limited slits (e.g. arrayed waveguide gratings) for astrophotonic spectroscopy.
TL;DR: Nanojoule blue femtosecond laser pulses were used for micromachining in living corneal tissue kept alive in Optisol-GS without causing cell death.
Abstract: Nanojoule blue femtosecond laser pulses were used for micromachining in living corneal tissue kept alive in Optisol-GS. Refractive index changes of 0.021 to 0.037 were obtained without causing cell death.
TL;DR: In this paper, recent developments in the astrophotonic applications of optical fiber taper transitions are discussed. And transitions between single multi-mode and multiple single-mode cores can help suppress the atmospheric OH emission that hampers ground-based IR astronomy.
Abstract: Recent developments in the astrophotonic applications of optical fibre taper transitions are discussed. For example, transitions between single multi-mode and multiple single-mode cores can help suppress the atmospheric OH emission that hampers ground-based IR astronomy.
TL;DR: In this article, the design and fabrication technologies of the PAL surface are described by B-spline parameters, and then the surface is fabricated using CXZ diamond turning technology.
Abstract: This paper focuses on the design and fabrication technologies of the PAL. The PAL surface is described by B-spline parameters. After the optimization of B-spline parameters, the surface is fabricated using CXZ diamond turning technology.
TL;DR: The sampling factor (Q) determines the scale relationship between the pupil and image plane and is presented in this work as a method for determining Q from image data.
Abstract: The sampling factor (Q) determines the scale relationship between the pupil and image plane. Knowledge of this quantity is essential for obtaining accurate retrieval results. We present a method for determining Q from image data.
TL;DR: In this paper, multi-beam interference lithography parameters are systematically analyzed and optimized and a variety of point geometries ranging from elliptical to rectilinear or rhombic intensity profiles are demonstrated.
Abstract: Multi-beam-interference lithography parameters are systematically analyzed and optimized. High absolute contrast and a variety of point geometries ranging from elliptical to rectilinear or rhombic intensity profiles are demonstrated.
TL;DR: In this paper, a transition metal doped ZnSe/As2S3:As2Se3composite material is proposed for mid-IR fiber-lasers.
Abstract: New transition metal doped ZnSe/As2S3:As2Se3composite materials are proposed for mid-IR fiber-lasers. Mid-IR room-temperature lasing of Cr:ZnSe/As2S3:As2Se3micro-composite material and Cr:ZnSe planar waveguide structures is demonstrated at 2.6 and 2.4 µm.
TL;DR: The good performance of a spectral criterion used for multiple-image optical compression and encryption even in the case where their spectra occupy same areas is shown.
Abstract: In this communication we show the good performance of a spectral criterion used for multiple-image optical compression and encryption even in the case where their spectra occupy same areas.
TL;DR: In this article, the authors present applications of spatial light modulators for optical trapping with low (i 0.2) NA and large field of view, creation of freely designable force fields, and for contrast enhancement methods in optical microscopy.
Abstract: We present applications of spatial light modulators for optical trapping with low (i0.2) NA and large field of view, creation of freely designable force fields, and for contrast enhancement methods in optical microscopy.
TL;DR: Simple design rules can be used to reduce astigmatism in off-axis reflective ophthalmic adaptive optics instruments by presenting the design of such devices with footprints smaller than a square foot.
Abstract: Simple design rules can be used to reduce astigmatism in off-axis reflective ophthalmic adaptive optics instruments. These rules will be illustrated by presenting the design of such devices with footprints smaller than a square foot.
TL;DR: In this paper, a multimodal retinal imaging system that combines the merits of photoacoustic ophthalmoscopy, optical coherence tomography, confocal laser scanning, and autofluorescence imaging has been developed.
Abstract: A multimodal retinal imaging system that combines the merits of photoacoustic ophthalmoscopy, optical coherence tomography, confocal laser scanning ophthalmoscopy, and autofluorescence imaging has been developed.
TL;DR: Spatial domain multiplexing allows co-propagation of multiple channels of same wavelength over a single strand of optical fiber as discussed by the authors, and it is shown that spatial multiplexer in multimode waveguides is a better choice than spatial multi-channel in the branching waveguide.
Abstract: Spatial domain multiplexing allows co-propagation of multiple channels of same wavelength over a single strand of optical fiber. Spatial multiplexer in multimode waveguides is presented and contrasted with spatial multiplexers in the branching waveguides.
TL;DR: In this article, a compact, vibration insensitive interferometer design that is well suited for measuring optics while mounted in situ on polishing equipment is presented, which employs a single-frame-phase sensor that permits acquisition in tens of microseconds to mitigate the effects of vibration or relative motion with the test part.
Abstract: A compact, vibration insensitive interferometer design that is well suited for measuring optics while mounted in situ on polishing equipment is presented. The system employs a single-frame-phase sensor that permits acquisition in tens of microseconds to mitigate the effects of vibration or relative-motion with the test-part. The theory of operation is presented along with experimental test results, which characterize repeatability and precision under static and high-vibration conditions.