Optical vortex discrimination with a transmission volume hologram

Gruneisen, Mark T.; Dymale, Raymond C.; Stoltenberg, Kurt E.; Steinhoff, Nicholas K.

doi:10.1088/1367-2630/13/8/083030

Cited by 14 publications

(14 citation statements)

References 23 publications

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“…However, none of these designs have proven to be efficient enough for separation of OAM modes at the single-photon level. Similarly, the results achieved using thick holograms have been only marginally better [20]. Leach et al have presented a technique for separating OAM modes at the singlephoton level based on using a Mach-Zehdner interferometer with a Dove prism in each arm [14].…”

Section: Introductionmentioning

confidence: 99%

Efficient separation of the orbital angular momentum eigenstates of light

et al. 2013

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Orbital angular momentum (OAM) of light is an attractive degree of freedom for fundamental studies in quantum mechanics. In addition, the discrete unbounded state-space of OAM has been used to enhance classical and quantum communications. Unambiguous measurement of OAM is a key part of all such experiments. However, state-of-the-art methods for separating single photons carrying a large number of different OAM values are limited to a theoretical separation efficiency of about 77%. Here we demonstrate a method which uses a series of unitary optical transformations to enable the measurement of light's OAM with an experimental separation efficiency of 492%. Furthermore, we demonstrate the separation of modes in the angular position basis, which is mutually unbiased with respect to the OAM basis. The high degree of certainty achieved by our method makes it particularly attractive for enhancing the information capacity of multi-level quantum cryptography systems.

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Section: Introductionmentioning

confidence: 99%

Efficient separation of the orbital angular momentum eigenstates of light

et al. 2013

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“…The recent interest in transverse momentum has largely centered on photon orbital angular momentum and considerable attention has been given to the task of de-multiplexing, or sorting, photons according to their angular momentum while minimizing cross talk between adjacent orthogonal field modes [7][8][9][10][11]. Demultiplexing is a projection operation that occurs when the incident photon states are matched to the states that form the measurement basis.…”

Section: Introductionmentioning

confidence: 99%

“…Photo-thermo-refractive (PTR) glass plane-wave-interference holograms are chosen for empirical measurements due to their high optical quality, high optical efficiency, stability, and well-defined characteristics that follow the predictions of coupled-wave theory [9,15,16]. The spatially varying amplitude and phase associated with the LTM states and their superpositions are imparted to individual photons via computergenerated holography (CGH) and a liquid-crystal (LC) spatial light modulator (SLM) [17].…”

Section: Introductionmentioning

confidence: 99%

Holography-based quantum projector in a state space of linear photon momentum

et al. 2015

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A transmission volume hologram is evaluated as a quantum projector operating on linear momentum states of individual photons in a four-dimensional state space. A state space is defined by four momentum vectors that are either efficiently diffracted or transmitted by the hologram. The influence of the volume hologram on the complex amplitudes of the basis states is modeled using coupled-wave theory. Measurement probabilities obtained with a second hologram introduced as a state-space analyzer are compared to measurement probabilities associated with a projection operator in quantum mechanics. A compact sequential hologram configuration for projecting superposition states onto all of the basis states is demonstrated for individual photons prepared in all 20 states of the five mutually unbiased bases of the four-dimensional state space. The complex amplitudes associated with superpositions of the basis states are imparted to individual photons via computer-generated holography and a liquid-crystal spatial light modulator. The coupled-wave theory analysis indicates that relative phase relationships in transmitted superposition states can be preserved to within 1/28th of an optical cycle and measured detection probabilities compare favorably to those associated with a quantum projector in a basis of discrete orthonormal states. Small departures of the measured statistics from theoretical expectations are quantified and attributed to imperfections in the hologram and experimental setup.

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“…Diffraction patterns (DPs) from different types of structures were studied [1][2][3][4] due to their special physical features: they contain hidden information about the diffractive structure properties [5][6][7][8]. For this reason, they are implied in many applications [9][10][11][12], the most pressing being information transfer, based on encoding procedures, by modulating light intensity and/or phase.…”

Section: Introductionmentioning

confidence: 99%

Independent and combined information transfer from axicon and helical phase distributions

2014

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Helical phase distributions used for optical information transfer increase its capacity by offering a characteristic spatial intensity arrangement for the diffracted beam. Here we propose the superposition between helical phase distribution with an axicon type. They form a composed object placed in the object arm to generate holographic masks. The diffracted patterns from these masks exhibit asymmetric shapes and peaks along the optical axis, with two kinds of spots, which contain independent or combined information from both phase distribution constructive parameters. To read these parameters based only on the diffraction patterns analysis, we generate the match reading masks (RMs) to be inserted in the optical path. In this proof-of-concept experiment, we demonstrate that one can sort constructive parameter values of each phase distribution, from both kinds of spots, using specific RMs.

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Optical vortex discrimination with a transmission volume hologram

Abstract: View the article online for updates and enhancements. Related contentHolography-based quantum projector in a state space of linear photon momentum Mark T Gruneisen, James P Black, Raymond C Dymale et al.

Cited by 14 publications

References 23 publications

Efficient separation of the orbital angular momentum eigenstates of light

Efficient separation of the orbital angular momentum eigenstates of light

Holography-based quantum projector in a state space of linear photon momentum

Independent and combined information transfer from axicon and helical phase distributions

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