2018
DOI: 10.1038/s41598-018-28447-1
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A compact diffractive sorter for high-resolution demultiplexing of orbital angular momentum beams

Abstract: The design and fabrication of a compact diffractive optical element is presented for the sorting of beams carrying orbital angular momentum (OAM) of light. The sorter combines a conformal mapping transformation with an optical fan-out, performing demultiplexing with unprecedented levels of miniaturization and OAM resolution. Moreover, an innovative configuration is proposed which simplifies alignment procedures and further improves the compactness of the optical device. Samples have been fabricated in the form… Show more

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Cited by 66 publications
(45 citation statements)
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“…The optical device has been designed for the telecom wavelength of 1310 nm, and optically characterized for the demultiplexing of beams with OAM in the range from -10 to +10. The possibility to replicate the fabricated optics with fast mass-production techniques, such as nano-imprint lithography [33,34], which can provide high-throughput and much lower production costs, makes these optical elements promising for integration into optical platforms for MDM.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The optical device has been designed for the telecom wavelength of 1310 nm, and optically characterized for the demultiplexing of beams with OAM in the range from -10 to +10. The possibility to replicate the fabricated optics with fast mass-production techniques, such as nano-imprint lithography [33,34], which can provide high-throughput and much lower production costs, makes these optical elements promising for integration into optical platforms for MDM.…”
Section: Resultsmentioning
confidence: 99%
“…This solution can dramatically reduce the channel overlap without sacrificing modal density. The fan-out optical operation could be included in the un-wrapper element, and the phase-corrector redesigned accordingly, as shown in [32,33], therefore maintaining the compactness and integration level of the optical device.…”
Section: Optical Characterizationmentioning
confidence: 99%
“…6). The total radiation probability is given by formula (45). Another one constraint on the bunch parameters follows from the form of the coherent interference factor ϕ n (k ⊥ σ ⊥ ).…”
Section: Stationary Fieldsmentioning
confidence: 99%
“…The generated twisted photons can be used further in various applications (see, e.g., [11][12][13][14][15][16][36][37][38][39]) or recorded by a specially designed detector of twisted photons. At the present moment, there are elaborated several methods to record twisted photons in the X-ray range [40] and below [41][42][43][44][45]. Thus the knowledge of properties of radiation of twisted photons by bunches of particles can also be employed for development of new methods of diagnostics of the bunch structure (see [2,18,46] for the examples of such techniques).…”
Section: Introductionmentioning
confidence: 99%
“…Currently, the twisted photons of different spectral ranges are used in fundamental science and technology [27][28][29][30][31][32]. In the optical range and below, the detectors are designed allowing to decompose an arbitrary electromagnetic radiation into twisted photons [36][37][38][39][40]. The formulas we obtain are aimed to describe correctly the radiation of hard twisted photons with MeV energies and above that are not accessible for a direct observation.…”
Section: Introductionmentioning
confidence: 99%