1.6-Octave Coherent OAM Supercontinuum Generation in As<sub>2</sub>S<sub>3</sub> Photonic Crystal Fiber

Geng, Wenpu; Bao, Changjing; Fang, Yuxi; Wang, Yingning; Li, Yiqiao; Wang, Zhi; Liu, Yange; Huang, Hao; Ren, Yongxiong; Pan, Zhongqi; Yue, Yang

doi:10.1109/access.2020.3023133

Cited by 22 publications

(8 citation statements)

References 34 publications

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“…18 The CDs of the fiber must be minimized if the signal is to be transmitted over long distances, the CD can be calculated by Eq. ( 5): 19 E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 0 5 ; 1 1 7 ; 2 9 6 8 > > > < > > > :…”

Section: Characteristic Analysis and Resultsmentioning

confidence: 99%

Hybrid-structured photonic crystal fiber for propagating vortex beams by multiple-core channels

Wang,

Yu,

et al. 2023

Opt. Eng.

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.Photonic crystal fibers (PCFs) have been extensively studied to enhance communication capacity and spectral efficiency by supporting orbital angular momentum (OAM) modes. However, the structural fragility resulting from the central air hole in PCFs undermines the fiber’s roundness. We introduce a hybrid PCF that replaces the central air hole with a material with a high refractive index. This innovation not only enhances the fiber’s structural strength but also introduces an additional communication channel. Furthermore, this method increases the amount of OAM modes supported for transmission in the ring. Numerical results demonstrate that significant differences in refractive indices exist between adjacent vector modes, with high mode quality (ranging from 74.6% to 97.6%) and a small effective mode area (ranging from 23.5 to 59.5 μm2). The proposed hybrid PCF can transmit 20 OAM modes in the inner core and 54 OAM modes in the outer ring. The spacing between the two layers of air holes has a minimal impact on the effective mode area and mode quality. However, the effective mode area decreases and the mode quality increases with the enlargement of the diameter of air holes. In addition, a decrease in doping concentration results in lower mode quality and a larger effective mode area. Moreover, the proposed hybrid PCF can be employed in OAM-based mode division multiplexing for high-capacity short-range fiber optic communication.

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Section: Characteristic Analysis and Resultsmentioning

confidence: 99%

Hybrid-structured photonic crystal fiber for propagating vortex beams by multiple-core channels

Wang,

Yu,

et al. 2023

Opt. Eng.

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“…For the other As2normalS3 PCFs presented in Refs. 14, 17, and 18, Figs. 7(a) and 7(b) show the profiles of the dispersion and confinement loss, respectively.…”

Section: Fiber Structure and Optimizationmentioning

confidence: 99%

“…The As2S3 glass possesses a wide transparency, a high nonlinear refractive index, and a sufficient laser induced damage threshold (LIDT). It has been extensively used in previous studies 17 – 19 …”

Section: Introductionmentioning

confidence: 99%

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Multi-octave supercontinuum generation of optical vortices in an As2S3 photonic crystal fibers with all-normal dispersion

Wen

Jia

2023

Opt. Eng.

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We designed an all-normal flat near-zero dispersion As 2 S 3 photonic crystal fiber (PCF) with orderly arranged air hole rings for generating an orbital angular momentum (OAM) supercontinuum (SC). We optimized the characters of chromatic dispersion and confinement loss compared with previous studies by carefully engineering the PCF. Simulation results show that, by launching a 100 fs 250 kW chirp-free hyperbolic secant pulse at 7 μm into a 5-mm designed PCF, a 9471-nm SC of OAM 1;1 forms from 757 to 10228 nm at a −40 dB level, which covers a 3.7-octave bandwidth. As the peak power increases, the higher-order OAM with a flatter chromatic dispersion profile in the normal dispersion region has a wider bandwidth. They are all highly coherent in the whole spectral range.

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“…Particularly, the spectral range of the SC is the crucial factor to be taken into consideration. Recently, SC carrying OAM in fiber has been reported to effectively expand the spectral coverage of the OAM beams [16]- [18].…”

Section: Introductionmentioning

confidence: 99%

1.3-Octave Coherent Supercontinuum Generation of OAM Mode in Ring-Core Fiber With All-Normal Dispersion

et al. 2022

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In this work, we design and numerically investigate a silica-cladded Germania-doped ringcore fiber (RCF) that supports orbital angular momentum (OAM) modes with all-normal dispersion. By optimizing the structure parameters of the designed RCF, an all-normal and flat dispersion with a total variation of < 60 ps/nm/km over 1035-nm bandwidth from 965 to 2000 nm is realized for the OAM 1,1 mode. A 1.3-octave supercontinuum spectrum of the OAM 1,1 mode is generated numerically after launching a 40fs 200-kW chirp-free hyperbolic secant pulse train centered at 1700 nm into a 2-cm long designed fiber with 50 mol% Ge-doped ring-core, covering 1290-nm bandwidth from 885 nm to 2175 nm at -40 dB power level. The coherence of the generated supercontinuum of the OAM 1,1 mode depicts nearly perfect property over the whole spectral range. This design can serve as an efficient way to extend the spectral coverage of beams carrying OAM modes in various applications.INDEX TERMS Orbital angular momentum, supercontinuum, all-normal dispersion, ring-core fiber.

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1.6-Octave Coherent OAM Supercontinuum Generation in As₂S₃ Photonic Crystal Fiber

Cited by 22 publications

References 34 publications

Hybrid-structured photonic crystal fiber for propagating vortex beams by multiple-core channels

Hybrid-structured photonic crystal fiber for propagating vortex beams by multiple-core channels

Multi-octave supercontinuum generation of optical vortices in an As2S3 photonic crystal fibers with all-normal dispersion

1.3-Octave Coherent Supercontinuum Generation of OAM Mode in Ring-Core Fiber With All-Normal Dispersion

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1.6-Octave Coherent OAM Supercontinuum Generation in As2S3 Photonic Crystal Fiber

Cited by 22 publications

References 34 publications

Hybrid-structured photonic crystal fiber for propagating vortex beams by multiple-core channels

Hybrid-structured photonic crystal fiber for propagating vortex beams by multiple-core channels

Multi-octave supercontinuum generation of optical vortices in an As2S3 photonic crystal fibers with all-normal dispersion

1.3-Octave Coherent Supercontinuum Generation of OAM Mode in Ring-Core Fiber With All-Normal Dispersion

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1.6-Octave Coherent OAM Supercontinuum Generation in As₂S₃ Photonic Crystal Fiber