Generation of the First-Order OAM Modes in Ring Fibers by Exerting Pressure Technology
We have proposed an effective method of generating the first-order orbital angular momentum (OAM) modes in ring fibers. The first-order OAM modes (<inline-formula><tex-math notation="LaTeX">${\rm{L = \pm 1}}$</tex-math> </inline-formula>) can be represented as the l...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2017-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/7870568/ |
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| Summary: | We have proposed an effective method of generating the first-order orbital angular momentum (OAM) modes in ring fibers. The first-order OAM modes (<inline-formula><tex-math notation="LaTeX">${\rm{L = \pm 1}}$</tex-math> </inline-formula>) can be represented as the linear superposition of the <inline-formula><tex-math notation="LaTeX"> ${\rm{HE}}_{{21}}^{{\rm{even}}}$</tex-math></inline-formula> mode and the <inline-formula><tex-math notation="LaTeX"> ${\rm{HE}}_{{21}}^{{\rm{odd}}}$</tex-math></inline-formula> mode. Through exerting pressure on the ring fiber by a leverage device, the fundamental mode <inline-formula><tex-math notation="LaTeX">${\rm{H}}{{\rm{E}}_{{11}}}$</tex-math> </inline-formula> can be coupled into higher order mode <inline-formula><tex-math notation="LaTeX"> ${\rm{H}}{{\rm{E}}_{{21}}}$</tex-math></inline-formula>in broadband wavelength ranging from 1530 to 1600 nm. By adjusting the fiber polarization controller and the pressure value exerted on the fiber, both the positive ( <inline-formula><tex-math notation="LaTeX">${\rm{L = + 1}}$</tex-math></inline-formula>) and negative (<inline-formula> <tex-math notation="LaTeX">${\rm{L = }} - {1}$</tex-math></inline-formula>) OAM modes can be generated separately. Moreover, we have demonstrated that the coupling efficiency from the fundamental mode to the first-order OAM modes at wavelength of 1550 nm can reach 67%. |
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| ISSN: | 1943-0655 |