Numerical Investigation of Microbending Loss in Optical Fibres

Jin, Xianqing; Payne, F.P.

doi:10.1109/jlt.2015.2503560

Cited by 17 publications

(3 citation statements)

References 24 publications

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“…As shown in the figure, the graphs of the bend loss calculated with the CMT for the 5/7-MG RCFs are close to the graphs of the measured MDL, which shows good agreement in bend loss between simulation and experimental results. To verify the validity of the bend loss calculated with the CMT, the beam propagation method (BPM) is used to obtain bend loss of a ~40mm RCF with microbends [27]. As seen in Fig.…”

Section: A Comparisons Between Experimental and Numerical Resultsmentioning

confidence: 99%

Mode Coupling Effects in Ring-Core Fibers for Space-Division Multiplexing Systems

Jin

Gómez

Shi

et al. 2016

J. Lightwave Technol.

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Abstract-An optical fibre with weak mode coupling is desirable for future ultra-high capacity space-division multiplexing (SDM) systems because mode coupling in an optical fibre results in extrinsic loss of the fibre and crosstalk between guided optical modes. To study the feasibility of a ring-core fibre (RCF) for SDM systems, in this paper, we investigate the mode coupling in the RCF supporting up to 5 or 7 guided mode groups (MGs) at a wavelength of 1550nm. For this purpose, the coupled mode/power theory (CMT/CPT) with a proposed form of the spatial power spectrum of random perturbations of fibre axis is used to calculate the bend loss/crosstalk of the RCF duo to microbending. It is shown that, based on the identified parameters for the spatial power spectrum in the 5/7-MG RCF, the calculated bend loss/crosstalk of the RCF agrees well with experimental results. In addition, the impact of the gradient parameter α and refractive index contrast Δ of the RCF on bend loss and crosstalk of the RCF is explored. Simulation results show that the Δ instead of the α significantly affects bend loss and crosstalk of the RCF. The magnitude improvement in bend loss by increasing the Δ is dependent on the spatial power spectrum rather than the number of guided mode groups in the RCF.

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Section: A Comparisons Between Experimental and Numerical Resultsmentioning

confidence: 99%

Mode Coupling Effects in Ring-Core Fibers for Space-Division Multiplexing Systems

Jin

Gómez

Shi

et al. 2016

J. Lightwave Technol.

Self Cite

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“…Combined with the simulation results in Figure 3 for the transmission inside and outside the bending arc when the waveguide is bent [24], it can be found that the value of γ is very small, almost zero, then Equation ( 8) can be simplified to:…”

Section: Sensing Principlesmentioning

confidence: 95%

Low-Cost Distributed Optical Waveguide Shape Sensor Based on WTDM Applied in Bionics

Sun,

Wang,

Liu

et al. 2023

Sensors

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Bionic robotics, driven by advancements in artificial intelligence, new materials, and manufacturing technologies, is attracting significant attention from research and industry communities seeking breakthroughs. One of the key technologies for achieving a breakthrough in robotics is flexible sensors. This paper presents a novel approach based on wavelength and time division multiplexing (WTDM) for distributed optical waveguide shape sensing. Structurally designed optical waveguides based on color filter blocks validate the proposed approach through a cost-effective experimental setup. During data collection, it combines optical waveguide transmission loss and the way of controlling the color and intensity of the light source and detecting color and intensity variations for modeling. An artificial neural network is employed to model and demodulate a data-driven optical waveguide shape sensor. As a result, the correlation coefficient between the predicted and real bending angles reaches 0.9134 within 100 s. To show the parsing performance of the model more intuitively, a confidence accuracy curve is introduced to describe the accuracy of the data-driven model at last.

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“…For an ideal optical fiber, the fiber axis is perfectly straight. However, the fiber axis randomly deviates from the ideal straight line [21] under high water pressure in the complex deep-ocean environment. The deviation from the ideal straightness of an optical fiber can be expressed as random bends, also called microbending [22], as demonstrated in Fig.…”

Section: ⅱ Microbending Theorymentioning

confidence: 98%

A Novel Trench-Assisted Optical Fiber With Ultra-Low Microbending Loss for the Full Ocean Depth Communication

Li,

Deng,

Huang

et al. 2023

IEEE Photonics J.

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A novel trench-assisted optical fiber with ultra-low microbending loss is proposed, which contains two trenches beside the core. The deformation distribution of the fiber axis caused by the wire mesh is in agreement with a Gaussian curve through the mechanical-optical model. By analyzing the microbending loss dependency on the optical fiber parameters, the optimal structure for the trench-assisted optical fiber was obtained. The fundamental mode field characteristics of the designed fiber under microbending were simulated using the finite element method, and the energy ratio of the designed fiber was obtained as 95.03%, which is larger than that of the conventional single-mode fiber. The designed fiber was fabricated based on the modified chemical vapor deposition (MCVD) technique and tested according to the modified plate method. The experimental results indicate that the fabricated fiber can support an ultra-low microbending loss of 0.0052 dB/m at 6 kg weight at 1550 nm, which is reduced by two orders of magnitude compared to the conventional single-mode fiber. The microbending loss measurement system exhibits good reliability and repeatability, and the measured results are consistent with the theory. The proposed optical fiber will be beneficial to improve the transmission efficiency of full ocean depth communication.

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Numerical Investigation of Microbending Loss in Optical Fibres

Cited by 17 publications

References 24 publications

Mode Coupling Effects in Ring-Core Fibers for Space-Division Multiplexing Systems

Mode Coupling Effects in Ring-Core Fibers for Space-Division Multiplexing Systems

Low-Cost Distributed Optical Waveguide Shape Sensor Based on WTDM Applied in Bionics

A Novel Trench-Assisted Optical Fiber With Ultra-Low Microbending Loss for the Full Ocean Depth Communication

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