Tunable Higher-order Orbital Angular Momentum Using Polarization-maintaining Fiber

Publication Date

7-5-2017

Document Type

Article

Organizational Units

Physics and Astronomy

Keywords

Beam shaping, Coupled mode theory, Optical angular momentum, Optical vortices, Polarization maintaining fibers, Space division multiplexing

Abstract

For the first time, to the best of our knowledge, light with orbital angular momentum (OAM) of ±2ℏ" role="presentation" style="box-sizing: border-box; display: inline; font-size: 12.88px; line-height: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">±2ℏ±2ℏ per photon is produced using commercially available polarization-maintaining fiber with modal purity of 96%. Twist measurements demonstrate that the average orbital angular momentum can be continuously tuned between ±2ℏ" role="presentation" style="box-sizing: border-box; display: inline; font-size: 12.88px; line-height: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">±2ℏ±2ℏ. The authors consider beams of non-integer OAM, created using the presented method, as superpositions of integer OAM states.

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