2-LP mode few-mode fiber amplifier employing ring-core erbium-doped fiber

Ono, Hirotaka; Hosokawa, Tsukasa; Ichii, Kentaro; Matsuo, Shoichiro; Nasu, Hitoshi; Yamada, Makoto

doi:10.1364/oe.23.027405

Cited by 46 publications

(16 citation statements)

References 8 publications

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“…We chose 980 nm LP 01 pumping, because we have assumed that the pumping light source of this EDF is the same LP 01 mode output LD as the conventional EDFA, and it is possible to perform more efficient pumping than the higher order modes that require mode conversion such as a phase plate. The erbium ions emission and absorption crosssections, and the signal/pump background losses we used are the same as those described by Ono et al [6] and Yamada et al [7]. Fig.…”

Section: Rc-edf Structure and Numerical Simulation Method: Figs 1a Amentioning

confidence: 99%

“…The erbium ions emission and absorption cross‐sections, and the signal/pump background losses we used are the same as those described by Ono et al . [6] and Yamada et al . [7].…”

Section: Rc‐edf Structure and Numerical Simulation Methodsmentioning

confidence: 99%

“…DMG is due to the difference between the overlapping of each mode and the core of the erbium-doped fibre (EDF). To improve the DMG property by employing a structure that suppresses the difference in the overlapping, a ring-core erbium-doped fibre (RC-EDF) was proposed [6][7][8][9], and an FM-EDFA for two-LP mode (LP 01 and LP 11 modes) amplification has been realised with a DMG of < 0.5 dB [6]. It has also been clarified that the DMG of the two-LP mode can be reduced to zero by optimising the refractive index difference and the inner and outer radii for theoretical investigation [7].…”

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confidence: 99%

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Three‐ to five‐signal LP‐mode amplification characteristics of ring‐core erbium‐doped fibre

et al. 2019

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We simulated the differential modal gain (DMG) property of WDM amplification characteristics for a ring-core erbium-doped fibre (RC-EDF) to clarify the possibility of an RC-EDF being used as a three-to five-signal LP-mode amplification medium. The authors defined two parameters, DMG YY-XX and WDG XX. The former and the latter are the difference between the gains of the LP XX mode and the LP YY mode at the shortest wavelength, and the gains of the LP XX mode at the shortest and longest wavelengths of WDM signal channel, respectively. XX and YY indicate the signal LP mode number. The authors present contour diagrams of the maximum DMG YY−XX and maximum WDG XX on the allowable three-to five-signal LP-mode areas of the RC-EDF. They confirm that it is possible to realise the amplification with a maximum DMG YY−XX of ≤2 dB, ≤1 dB, and about 2 dB for the 3, 4, and 5-LP modes and a maximum WDG XX of ≤ 1 dB for the three-to five-LP mode. The authors found that it is possible to realise an amplifier for 3-5 LP modes that operate with a relatively low DMG by using RC-EDF.

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Section: Rc-edf Structure and Numerical Simulation Method: Figs 1a Amentioning

confidence: 99%

“…The erbium ions emission and absorption cross‐sections, and the signal/pump background losses we used are the same as those described by Ono et al . [6] and Yamada et al . [7].…”

Section: Rc‐edf Structure and Numerical Simulation Methodsmentioning

confidence: 99%

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confidence: 99%

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Three‐ to five‐signal LP‐mode amplification characteristics of ring‐core erbium‐doped fibre

et al. 2019

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“…RI profiles of the RCFs: The RI profile will also affect the DMG performance of the core-pumped RCF-EDFAs. H. Ono et al analysed how the combinations of the inner and outer radius of the SI-RCF affected the DMG of their 2-LP-mode RCF-based EDFAs and reported that low DMG could be achieved by adopting the inner radius of about 2.5-4 μm and the outer radius near the LP21 cut-off values [81,82]. Based on simulation [77] and experimental [76] results, Y. Jung et al showed that lower DMG of the EDFA could be achieved by utilizing GI-RCF under core-pumped operation without severe micro-bending, compared with that of the SI-RCF EDFA with large differential RI between core and cladding [78].…”

Section: A Rcf-based Erbium Doped Fibre Amplifiers (Edfas)mentioning

confidence: 99%

Mode Division Multiplexing Based on Ring Core Optical Fibers

Liu

Zhu

Zhang

et al. 2018

IEEE J. Quantum Electron.

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The unique modal characteristics of ring core fibres potentially enable the implementation of mode-division multiplexing (MDM) schemes that can increase optical data transmission capacity with either low complexity modular multiinput multi-output (MIMO) equalization or no MIMO. This paper attempts to present an comprehensive review of recent research on key aspects of RCF-based MDM transmission. Starting from fundamental fibre modal structures, a theoretical comparison between RCF and conventional step-index and graded-index multi-mode fibres in terms of their MDM capacity and the associated MIMO complexity is given first as the underlining rationale behind RCF-MDM. This is followed by a discussion of RCF design considerations for achieving high mode channel count and low crosstalk performances in either MIMO-free or modular MIMO transmission schemes. The principles and implementations of RCF mode (de-)multiplexing devices are discussed in detail, followed by RCF-based optical amplifiers, culminating in MIMOfree or modular MIMO RCF-MDM data transmission schemes. A discussion on further research directions is also given.

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“…Recently we have theoretically proposed a FM-RC-EDFA capable of providing almost identical gain among six mode groups within the C-band using either core-or claddingpumped implementations [6]. In reference [7], the first ring-core fibre (RCF) amplifier supporting two mode groups (LP01 and LP11) has been demonstrated and a small DMG of around 1dB was realized.…”

Section: Introductionmentioning

confidence: 99%