Coupling Efficiency of a Partially Coherent Radially Polarized Vortex Beam into a Single-Mode Fiber

Zhu, Xinlei; Wang, Kuilong; Wang, Fei; Zhao, Chengliang; Cai, Yangjian

doi:10.3390/app8081313

Cited by 11 publications

(4 citation statements)

References 31 publications

(35 reference statements)

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“…2 However, whether it is in the process of increasing the number of lenses or building a precision system, these methods have problems such as large instruments and low system flexibility. 3 There will be certain restrictions when performing imaging. In order to reduce the difficulty and cost of preparation and at the same time meet the needs of miniaturization, microlenses have begun to appear in the field of vision of researchers.…”

Section: Introductionmentioning

confidence: 99%

Zemax-based optimized design of hydrogel fiber lens

Xie

Liu

2023

14th International Photonics and Optoelectronics Meetings (POEM 2022)

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In the optical fiber sensor, the signal light output from the silica fiber is transmitted to the detector, which usually needs to be coupled through the lens focusing. However, this often destroys the compactness and flexibility of the optical fiber sensor system structure. Therefore, this article proposes a hydrogel fiber optic lens solution, that is, a method that can directly focus the signal light output from the silica fiber to the photodetector. Its bottom-up photochemical fixation method determines its flexible characteristics and can meet individual needs. In this article, according to the size of the image distance, that is, the distance from the silica fiber to the detector (image distance), and the size of the focus point on the detector (focal point), the curvature radius of the polyethylene glycol diacrylate (PEGDA)-based hydrogel fiber lens and the distance from its apex to the silica fiber end face (object distance) are optimized. Through simulation, it finds that, with the decrease in the curvature radius, the focus point of the hydrogel fiber lens would appear at a shorter image distance and the change in the object distance length would not significantly affect the position of the focus point of the lens. The focus point of the lens focusing on the central bright spot decrease with the decrease in the curvature radius, which is consistent with the variation trend of the Airy spot in the simulation. This simulation confirms that a smaller curvature radius could be able to improve the focusing effect of the hydrogel fiber lens.

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Section: Introductionmentioning

confidence: 99%

Zemax-based optimized design of hydrogel fiber lens

Xie

Liu

2023

14th International Photonics and Optoelectronics Meetings (POEM 2022)

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“…In addition to long-distance telecommunication networks, fibre optic couplers are used in various other areas, such as optical sensors in biophotonics [9], [10], combined optical coherence tomography and hyperspectral imaging in medicine [11], free-space optical communications [12], etc. Optimum performance of optical fibre amplifiers is also determined by the optical composition of optical fibres and their resistance to harsh environmental conditions [13]- [17].…”

Section: Introductionmentioning

confidence: 99%

Fibre Optical Coupler Simulation by Comsol Multiphysics Software

Elsts

Supe

Spolītis

et al. 2022

Latvian Journal of Physics and Technical Sciences

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The paper presents a simulation model developed for a special optical coupler intended for coupling radiation from signal and pump sources used for the realization of cladding-pumped doped fibre amplifiers. The model is developed in COMSOL Multiphysics and used to assess the pumping efficiency for different side pumping angles and different numbers of electromagnetic modes. The obtained results show that the highest pumping efficiency, above 75 %, is achieved for 5–14 modes when two fibres representing the pump source and the signal source form a 10-degree angle between their central axes. The search for the optimal number of modes corresponds to the development trend in optical coupler technology where the multimode pumping by light-emitting diode (LED) replaces the classical scheme with a single-mode pumping by a laser diode (LD).

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“…To couple the received laser beam into a SMF and obtain the maximum signal-to-noise ratio, it is necessary to maximize the coupling efficiency (CE) [4,[22][23][24][25][26][27][28]. To this effect, CE has crucial significance in terms of ALTD system performance.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Spatial Mode Distribution on Coupling Efficiency of Single-Mode Fiber: Theoretical Analysis and Experimental Verification

Liu

Wang

et al. 2019

Applied Sciences

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Featured Application: The research results in this paper are helpful for researchers to analyze and design the adaptive optics (AO) systems for atmospheric laser transmission and detection systems, such as free space optical communication and gas sensing lidar. The method in this paper can be used to study the residual margin allocation of AO system under different coupling efficiency thresholds.Abstract: In this study, Zernike polynomials and optical fiber field theory are applied to build a mathematical model of coupling efficiency (CE) and spatial mode of aberrations. The theory built in this paper can be used to quickly calculate the CE affected by a single aberration as well as the aberrations caused by atmospheric turbulence. The aberrations are classified based on Zernike polynomials and the effects of aberrations on CE of different types and different spatial frequencies are analyzed. The influence of the effects of AO system residual errors is also analyzed. Adaptive optics (AO) equipment is applied to build a system on which the proposed theory was tested; the experimental results validate the theoretical analysis.

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Coupling Efficiency of a Partially Coherent Radially Polarized Vortex Beam into a Single-Mode Fiber

Cited by 11 publications

References 31 publications

Zemax-based optimized design of hydrogel fiber lens

Zemax-based optimized design of hydrogel fiber lens

Fibre Optical Coupler Simulation by Comsol Multiphysics Software

The Effect of Spatial Mode Distribution on Coupling Efficiency of Single-Mode Fiber: Theoretical Analysis and Experimental Verification

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