Modal Characteristics Analysis of Orbital Angular Momentum in a Modified Ring Fiber

Guiyong, 黄桂勇 Huang; Shouli, 周守利 Zhou; Yali, 覃亚丽 Qin; Linlin, 薛林林 Xue; Man, 鄢曼 Yan

doi:10.3788/lop52.080604

Cited by 2 publications

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“…The initial studies had focused on the transmission of OAM modes in free space and suffered from short transmission distances. Since 2009, the index separation between adjacent OAM vector modes has been considerably enhanced by ring-core optical fiber structures [4][5][6][7][8][9][10]. In 2013, Bozinovic et al [11] implemented OAM mode multiplexing in a ring-core optical fiber with a length of more than 1.1 km.…”

Section: Introductionmentioning

confidence: 99%

Orbital Angular Momentum Optical Amplifier Based on PbS-Doped Ring-Core Fiber

Xu¹,

Shang²,

Yang³

et al. 2020

Front. Phys.

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A unique orbital angular momentum (OAM) optical amplifier based on a ring-core fiber doped with lead sulfide (PbS) is realized for the first time in this study. The PbS-doped ring-core fiber is fabricated using the modified chemical vapor deposition method. The cross-sectional microscope image of the fiber is obtained. The difference in the refractive index between the ring core and the fiber cladding measured by a three-dimensional refractive index tester reaches 1%. The sulfur and lead content in the ring-core of the PbS-doped ring-core fiber is confirmed by energy spectrum analysis. A first-order OAM optical amplifier is built based on the PbS-doped ring-core fiber. The experiment confirms that the air-hole PbS-doped ring-core fiber can support the OAM |l| = 1 modes. In addition, 2.3 dB of on-off gain is obtained for the OAM |l| = 1 modes at 1,550 nm. The fluorescence spectrum obtained using the backward pumping method ranges from 1,100 to 1,600 nm.

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Section: Introductionmentioning

confidence: 99%

Orbital Angular Momentum Optical Amplifier Based on PbS-Doped Ring-Core Fiber

Xu¹,

Shang²,

Yang³

et al. 2020

Front. Phys.

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show abstract

“…However, in the actual propagation process, high refractive index materials will increase the transmission loss of the propagation process [67], so it is particularly important to balance the problem of mode degeneration and high refractive index transmission loss. Huang et al [66] improved the SI-RCF by introducing a high refractive index material between the cladding and the transmission layer. Since the high refractive index material does not transmit OAM, the RCF can transmit the OAM more effectively.…”

Section: Ring Core Fibermentioning

confidence: 99%

Generation, Transmission and Application of Orbital Angular Momentum in Optical Fiber: A Review

Lian

Wang

et al. 2021

Front. Phys.

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Optical orbital angular momentum (OAM) has become a hot research topic because of its unique properties due to its spiral distribution of phases. The production and transmission of OAM has also become a necessary condition for effective use of OAM. As an optical waveguide with good propagation properties, optical fibers are used in optical systems supporting OAM. This paper introduces the OAM generation and transmission system based on fiber, summarizes the current photonic crystal fiber, ring core fiber, fiber grating and other all-fiber systems that can support OAM modes, and explains some experimental principles. Finally, an outlook on OAM generation or transmission devices for all-fiber systems is presented, providing a useful reference for future related research.

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Modal Characteristics Analysis of Orbital Angular Momentum in a Modified Ring Fiber

Cited by 2 publications

References 0 publications

Orbital Angular Momentum Optical Amplifier Based on PbS-Doped Ring-Core Fiber

Orbital Angular Momentum Optical Amplifier Based on PbS-Doped Ring-Core Fiber

Generation, Transmission and Application of Orbital Angular Momentum in Optical Fiber: A Review

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