Free-space communication through turbulence: a comparison of plane-wave and orbital-angular-momentum encodings

Mirhosseini, Mohammad; Rodenburg, Brandon; Malik, Mehul; Boyd, Robert W.

doi:10.1080/09500340.2013.834084

Cited by 18 publications

(16 citation statements)

References 27 publications

(50 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The numerical value of N f is related to the total number of spatial modes that the channel supports, and the value of 33 was chosen to be both realistic as well as large enough to support at least a few dozen OAM modes [12].…”

Section: Simulating Thick Turbulence In the Laboratorymentioning

confidence: 99%

Simulating thick atmospheric turbulence in the lab with application to orbital angular momentum communication

et al. 2014

Self Cite

View full text Add to dashboard Cite

We wish to report a typographical error made in the preparation of our manuscript. Specifically, on line 10 of the second paragraph of page 5, we quote values of the parameters that we use to simulate the turbulence. The distances we quote are = z 171.7 1 m and = z 1.538 2 m. The first value is correct, but the second value should read = z 769 2 m. The correct value was used in our laboratory studies, and thus the conclusions of the paper are not modified.We thank Jeffery H Shapiro of MIT for pointing out to us an inconsistency in our published paper, which we subsequently traced to the incorrect value of z 2 quoted in the text. AbstractWe describe a procedure by which a long (≳1 km) optical path through atmospheric turbulence can be experimentally simulated in a controlled fashion and scaled down to distances easily accessible in a laboratory setting. This procedure is then used to simulate a 1 km long free-space communication link in which information is encoded in orbital angular momentum spatial modes. We also demonstrate that standard adaptive optics methods can be used to mitigate many of the effects of thick atmospheric turbulence.

show abstract

Section: Simulating Thick Turbulence In the Laboratorymentioning

confidence: 99%

Simulating thick atmospheric turbulence in the lab with application to orbital angular momentum communication

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…where D f 0 is the number of DoFs of the turbulence-free FSO channel (in the near field) or more precisely the eigensum of SVD of the vacuum-propagation Green's function, h 0 (r, r ), which can be obtained by removing the term e χ(r,r )+jϕ(r,r ) from the Green's function in (3). Note that E{D f } = D f 0 is conveniently expressed as a function of the system geometry, which is, in fact, the product of Fresnel numbers at transmit and receiver apertures.…”

Section: A the Degrees Of Freedom Of Fso Channelsmentioning

confidence: 99%

MIMO optical wireless communication via monolithic or sparse apertures

Safari¹,

Huang²

2018

J. Opt.

View full text Add to dashboard Cite

In this paper, a general optical wireless communication (OWC) system impaired by atmospheric turbulence is studied. It is shown that if the geometry of the overall OWC system lies in the near-field regime, it can benefit from the advantages of a full multiple-input multiple-output (MIMO) system whether it is implemented by monolithic or sparse apertures. A unified framework is presented to analyze such MIMO OWC systems and their achievable diversity and multiplexing gains are estimated. Moreover, assuming that the size of OWC transceivers and the number of utilized degrees of freedom are constrained, the performance of MIMO OWC systems using monolithic or sparse apertures are compared. The results show that the multiplexing systems with monolithic apertures outperform those with sparse apertures in weaker turbulence conditions but it is expected that their superiority vanishes in the presence of strong turbulence. In terms of spatial diversity, the two design approaches provide similar gains.

show abstract

“…A second lens placed at the receiver separates these tilted plane-waves in spatial location at its back focal plane with relatively low crosstalk (see Fig.1) [12]. We note that plane-waves in the context of a communications link have been postulated to offer comparable channel capacity to other orthogonal mode sets [12], along with being shown to potentially be more resilient to crosstalk induced by atmospheric turbulence than LG modes [14,15]. Our approach is similar to line-of-sight (LOS) MIMO implemented in RF wireless communications, where an array of spatially separated transmitters and receivers are used.…”

Section: Ocis Codes: (2002605) Free-space Optical Communication (20mentioning

confidence: 99%

Demonstration of a 280 Gbit/s free-space space-division-multiplexing communications link utilizing plane-wave spatial multiplexing

et al. 2016

View full text Add to dashboard Cite

We demonstrate a 280-Gbit/s free-space SDM communications link incorporating a set of independent tilted truncated plane-waves, each generated by a single mode fiber placed at the back-focal plane of a spherical lens. Each of the 7 tilted plane-wave channels are encoded with a 40-Gbit/s 16-QAM signal. Our approach comprises two identical linear fiber-arrays placed approximately 5 m apart. As each fiber array is placed at the back-focal-plane of a spherical lens, each fiber array is effectively placed in a conjugate image plane of the other. A channel crosstalk less than 26 dB is shown, with a bit-error-rate below the FEC threshold of 3.8 × 10−3.

show abstract

Free-space communication through turbulence: a comparison of plane-wave and orbital-angular-momentum encodings

Cited by 18 publications

References 27 publications

Simulating thick atmospheric turbulence in the lab with application to orbital angular momentum communication

Simulating thick atmospheric turbulence in the lab with application to orbital angular momentum communication

MIMO optical wireless communication via monolithic or sparse apertures

Demonstration of a 280 Gbit/s free-space space-division-multiplexing communications link utilizing plane-wave spatial multiplexing

Contact Info

Product

Resources

About