Multicasting of signal-carrying Gaussian mode to multiple orbital angular momentum (OAM) modes

2016 ◽  
Author(s):  
Shuhui Li ◽  
Nan Zhou ◽  
Jian Wang
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Gaussian Mode

High-dimensional orbital angular momentum entanglement concentration based on Laguerre–Gaussian mode selection

2013 ◽  
Vol 10 (9) ◽  
pp. 095201 ◽  
Author(s):  
Wuhong Zhang ◽  
Ming Su ◽  
Ziwen Wu ◽  
Meng Lu ◽  
Bingwei Huang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Mode Selection ◽  
Entanglement Concentration ◽  
High Dimensional ◽  
Gaussian Mode

scholarly journals On-Chip Guiding of Higher-Order Orbital Angular Momentum Modes

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 72 ◽  
Author(s):  
In Joon Lee ◽  
Sangin Kim
Keyword(s):  
Angular Momentum ◽  
Field Distribution ◽  
Orbital Angular Momentum ◽  
Rotational Symmetry ◽  
Higher Order ◽  
Waveguide Structure ◽  
Rotation Symmetry ◽  
Gaussian Mode ◽  
On Chip ◽  
Topological Charges

Higher-order orbital angular momentum (OAM) mode guiding in a waveguide which is suitable for on-chip integration has been investigated. Based on the relation between the Laguerre-Gaussian mode and the Hermite-Gaussian mode, it has been shown that two degenerate guided modes of π/2l-rotation symmetry can support the l-th order OAM mode. In order to mimic the rotational symmetry, we have proposed the waveguide structure of a cross-shaped core and designed a waveguide that can support OAM modes of ±1 and ±2 topological charges simultaneously at a wavelength of 1550 nm. Purity of the OAM modes guided in the designed waveguide has been assessed by numerically calculating their topological charges from the field distribution, which were close to the theoretical values. We also investigated the guiding of OAM modes of ±3 and ±4 topological charges in our proposed waveguide structure, which revealed the possibility of the separate guiding of those OAM modes with relatively lower purity.

Orbital angular momentum correlations with a phase-flipped Gaussian mode pump beam

2012 ◽  
Vol 14 (8) ◽  
pp. 085401 ◽  
Author(s):  
J Romero ◽  
D Giovannini ◽  
M G McLaren ◽  
E J Galvez ◽  
A Forbes ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Pump Beam ◽  
Gaussian Mode

scholarly journals Engineering Entangled Photons for Transmission in Ring-Core Optical Fibers

2021 ◽  
Vol 9 ◽  
Author(s):  
G. Cañas ◽  
E. S. Gómez ◽  
E. Baradit ◽  
G. Lima ◽  
S. P. Walborn
Keyword(s):  
Angular Momentum ◽  
Optical Fibers ◽  
Orbital Angular Momentum ◽  
Entangled Photons ◽  
Two Photon ◽  
Twisted Light ◽  
Optical Communication Channels ◽  
Gaussian Mode ◽  
Constant Shape ◽  
Ring Core

The capacity of optical communication channels can be increased by space division multiplexing in structured optical fibers. Radial core optical fibers allows for the propagation of twisted light–eigenmodes of orbital angular momentum, which have attracted considerable attention for high-dimensional quantum information. Here we study the generation of entangled photons that are tailor-made for coupling into ring core optical fibers. We show that the coupling of photon pairs produced by parametric down-conversion can be increased by close to a factor of three by pumping the non-linear crystal with a perfect vortex mode with orbital angular momentum ℓ, rather than a gaussian mode. Moreover, the two-photon orbital angular momentum spectrum has a nearly constant shape. This provides an interesting scenario for quantum state engineering, as pumping the crystal with a superposition of perfect vortex modes can be used in conjunction with the mode filtering properties of the ring core fiber to produce simple and interesting quantum states.

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