Compact and sturdy orbital angular momentum sorter without destroying photon states

Zhang, Jingfeng; Kong, Ling‐Jun; Zhang, Zhuo; Zhang, Furong; Zhang, Xiangdong

doi:10.1088/2040-8986/accd7f

Cited by 4 publications

(2 citation statements)

References 55 publications

(61 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is beyond the scope of this work to include multiple modes with orbital angular momentum for discussing about the higher-order Poincaré sphere [12,[75][76][77][78][79][80][81][82][83][84][85]. However, many important progresses are being made in the area of spin textures [86-90] and classical entanglement [39, [91][92][93][94][95][96][97], such that we would like to outline how our theory will be extended to discuss these effects for the future [71,98,99].…”

Section: Spin Textures and Classical Entanglementmentioning

confidence: 99%

Quantum field theory for coherent photons: isomorphism between Stokes parameters and spin expectation values

Saito

2024

Front. Phys.

View full text Add to dashboard Cite

Stokes parameters (S) on the Poincaré sphere are very useful values to describe the polarisation state of photons. However, the fundamental principle on the nature of polarisation is not completely understood, yet, because we have no concrete consensus on how to describe spin of photons, quantum-mechanically. Here, we have considered a monochromatic coherent ray of photons, described by a many-body coherent state, and established a fundamental basis to describe the spin state of photons, in connection with a classical description based on Stokes parameters. We show that a spinor description of the coherent state is equivalent to Jones vector for polarisation states, and obtain the spin operators (Ŝ) of all components based on rotators in an SU(2) group theory. Polarisation controllers such as phase-shifters and rotators are also obtained as quantum-mechanical field operators to change the phase of the wavefunction for polarisation states. We show that the Stokes parameters are quantum-mechanical average of the spin operators, S=⟨Ŝ⟩.

show abstract

Section: Spin Textures and Classical Entanglementmentioning

confidence: 99%

Quantum field theory for coherent photons: isomorphism between Stokes parameters and spin expectation values

Saito

2024

Front. Phys.

View full text Add to dashboard Cite

show abstract

“…OAM mode sorters have been implemented using several techniques, such as with the use of spatial light modulators, ,− q-plates, , geometrical transformations, log-polar coordinate transformations, , spiral transformations, , multiplane converters, − and Porro prisms . There are also free-space interferometric-based schemes that perform OAM mode sorting by applying relative phases related to the topological charge scriptl of the incoming modes using dove prisms. − All of these systems are based on performing operations on the OAM modes using bulk optics, which makes their integration into current telecommunication networks difficult.…”

Section: Introductionmentioning

confidence: 99%

All-in-Fiber Dynamically Reconfigurable Orbital Angular Momentum Mode Sorting

Alarcón,

Gómez,

Spegel-Lexne

et al. 2023

ACS Photonics

View full text Add to dashboard Cite

The orbital angular momentum (OAM) spatial degree of freedom of light has been widely explored in many applications, including telecommunications, quantum information, and light-based micromanipulation. The ability to separate and distinguish between the different transverse spatial modes is called mode sorting or mode demultiplexing, and it is essential to recover the encoded information in such applications. An ideal d mode sorter should be able to faithfully distinguish between the different d spatial modes, with minimal losses, and have d outputs and fast response times. All previous mode sorters rely on bulk optical elements, such as spatial light modulators, which cannot be quickly tuned and have additional losses if they are to be integrated with optical fiber systems. Here, we propose and experimentally demonstrate, to the best of our knowledge, the first all-in-fiber method for OAM mode sorting with ultrafast dynamic reconfigurability. Our scheme first decomposes the OAM mode in-fiber-optical linearly polarized (LP) modes and then interferometrically recombines them to determine the topological charge, thus correctly sorting the OAM mode. In addition, our setup can also be used to perform ultrafast routing of the OAM modes. These results show a novel and fiber-integrated form of optical spatial mode sorting that can be readily used for many new applications in classical and quantum information processing.

show abstract

SU(N) symmetry of coherent photons controlled by rotated waveplates

Saito

2024

Heliyon

View full text Add to dashboard Cite

Compact and sturdy orbital angular momentum sorter without destroying photon states

Cited by 4 publications

References 55 publications

Quantum field theory for coherent photons: isomorphism between Stokes parameters and spin expectation values

Quantum field theory for coherent photons: isomorphism between Stokes parameters and spin expectation values

All-in-Fiber Dynamically Reconfigurable Orbital Angular Momentum Mode Sorting

SU(N) symmetry of coherent photons controlled by rotated waveplates

Contact Info

Product

Resources

About