Enabling the study of photons orbital angular momentum for optical communications

Cunha, André; Figueira, Gonçalo; André, Paulo

doi:10.1007/s11082-016-0668-x

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…The spatial-generating methods include the use of spatial devices such as cylindrical lenses [62][63][64][65][66], spiral phase plates [67][68][69][70][71][72][73][74], Phase holograms [75][76][77][78][79][80][81], spatial light modulators [82][83][84][85][86][87][88], and q-plates [89-92].…”

Section: Spatial-generating Methodsmentioning

confidence: 99%

Generation of Photon Orbital Angular Momentum and Its Application in Space Division Multiplexing

2023

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In the last three decades, light’s orbital angular momentum (OAM) has been of great interest because it has unique characteristics that make it sought after in many research fields, especially in optical communications. To address the exponentially increasing demands for higher data rates and capacity in optical communication systems, OAM has emerged as an additional degree of freedom for multiplexing and transmitting multiple independent data streams within a single spatial mode using the spatial division multiplexing (SDM) technology. Innumerable research findings have proven to scale up the channel capacity of communication links by a very high order of magnitude, allowing it to circumvent the reaching of optical fiber’s non-linear Shannon limit. This review paper provides a background and overview of OAM beams, covering the fundamental concepts, the various OAM generators, and the recent experimental and commercial applications of the OAM-SDM multiplexing technique in optical communications.

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Section: Spatial-generating Methodsmentioning

confidence: 99%

Generation of Photon Orbital Angular Momentum and Its Application in Space Division Multiplexing

2023

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“…On the other hand, OAM is associated with the spatial mode of a light beam with optical vortices [21,22], which are characterized by a twisted wavefront and a complex field amplitude [23]. The OAM of light is a new optical degree of freedom that arises from the spatial distribution of the wavefront and describes the rotation of the wave around its propagation axis with a measure of intensity distribution and phase information [24]. OAM beams are characterized by a helical wavefront, which imparts a rotational motion to the beam around its propagation axis (Figure 1).…”

Section: Background Generation and Application Of Oam Lightmentioning

confidence: 99%

Generation of Orbital Angular Momentum Light by Patterning Azopolymer Thin Films

Olaleye,

Raposo,

Ribeiro

2023

Photonics

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Orbital angular momentum (OAM) encoding is a promising technique to boost data transmission capacity in optical communications. Most recently, azobenzene films have gained attention as a versatile tool for creating and altering OAM-carrying beams. Unique features of azobenzene films make it possible to control molecular alignment through light-induced isomerization about the azo bond. This feature enables the fabrication of diffractive optical devices such as spiral phase plates and holograms by accurately imprinting a phase profile on the incident light. By forming azobenzene sheets into diffractive optical elements, such as spiral phase plates, one can selectively create OAM-carrying beams. Due to the helical wavefront and phase variation shown by these beams, multiple distinct channels can be encoded within a single optical beam. This can significantly increase the data transmission capacity of optical communication systems with this OAM multiplexing technique. Additionally, holographic optical components made from azobenzene films can be used to build and reconstruct intricate wavefronts. It is possible to create OAM-based holograms by imprinting holographic designs on azobenzene films, which makes it simpler to control and shape optical beams for specific communication requirements. In addition, azobenzene-based materials can then be suitable for integration into optical communication devices because of their reconfigurability, compactness, and infrastructure compatibility, which are the main future perspectives for achieving OAM-based technologies for the next generation, among other factors. In this paper, we see the possible use of azobenzene films in the generation and modification of OAM beams for optical communications through light-induced isomerization. In addition, the potential role of azobenzene films in the development of novel OAM-based devices that paves the way for the realization of high-capacity, OAM-enabled optical communication networks are discussed.

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“…Recently, data rates of 1.1 Gb/s using a light emitting diode (LED) and employing carrier‐less amplitude and phase modulation have been demonstrated, as well as transmissions reaching 10 Gb/s using vertical cavity surface emitting laser (VCSEL) and spatial division multiplexing . The exploration of other degrees of freedom was reported, namely the use of orbital angular momentum . The highest bitrate transmission using VLC, to the best of our knowledge, reached 20 Gb/s using beam steering and computer generated holograms …”

Section: Introductionmentioning

confidence: 99%

Wavefront spatial‐phase modulation in visible optical communications

Sabino

Figueira²,

André

2017

Micro & Optical Tech Letters

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Enabling the study of photons orbital angular momentum for optical communications

Cited by 4 publications

References 12 publications

Generation of Photon Orbital Angular Momentum and Its Application in Space Division Multiplexing

Generation of Photon Orbital Angular Momentum and Its Application in Space Division Multiplexing

Generation of Orbital Angular Momentum Light by Patterning Azopolymer Thin Films

Wavefront spatial‐phase modulation in visible optical communications

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