Fabrication of polymer microlenses on single mode optical fibers for light coupling

Zaboub, Monsef; Guessoum, Assia; Demagh, Nacer-Eddine; Guermat, Abdelhak

doi:10.1016/j.optcom.2015.12.010

Cited by 33 publications

(7 citation statements)

References 16 publications

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“…Microlenses, mirrors, and similar components have been incorporated into a wide variety of optoelectronic devices and are particularly fundamental to modern image sensor technologies. , Polymer-based microlens arrays for LED out-coupling and related light trapping techniques for solar cells , have been demonstrated. There has also been work on direct-contact compact lens arrays for III–V multijunction solar cells. , The strategies used for light trapping or concentration in high-efficiency III–V solar cells are typically not suitable for CQD solar cells due to their low carrier mobilities and consequent pure vertical transport, and concentrator geometries must be more accurately controlled to match the low form factors of CQD devices.…”

Section: Resultsmentioning

confidence: 99%

Integrated Concentrators for Scalable High-Power Generation from Colloidal Quantum Dot Solar Cells

Lin

Ung

Qiu

et al. 2018

ACS Appl. Energy Mater.

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Although record efficiencies in colloidal quantum dot (CQD) solar cells continue to increase, they are still demonstrated on impractically small-area devices. Concentrators can effectively enlarge the active area, allowing scaled-up energy harvesting. Here, we present an economical and scalable method to fabricate compact concentrators made from polydimethylsiloxane using 3D-printed molds, which are directly bonded to CQD solar cells. The resulting integrated systems deliver more than a 20-fold increase in photocurrent and power, as well as significant open circuit voltage enhancements, over the original cells. We use the integrated systems to identify limiting factors in CQD solar cell operation under high irradiance. Our method could pave the way to making practical high-power solution-processed solar cells.

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Section: Resultsmentioning

confidence: 99%

Integrated Concentrators for Scalable High-Power Generation from Colloidal Quantum Dot Solar Cells

Lin

Ung

Qiu

et al. 2018

ACS Appl. Energy Mater.

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“…Depending on this quantity of PDMS, different thicknesses T can be formed, and for a given quantity of PDMS deposited, the same microlens characteristics are always obtained for a given transverse profile. The process of alignment and deposition of the polymer at the fiber output is monitored and controlled by an acquisition system composed of a horizontal microscope, a CCD camera and a microcomputer [23].…”

Section: Pdms Depositmentioning

confidence: 99%

Hemi-ellipsoidal microlensed fiber based on polishing and polymer technology

Boulaiche¹,

Rochard²,

Guessoum³

et al. 2021

Eng. Res. Express

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This paper represents a development of a new advanced technology to fabricate and characterize micro-collimators with hemi-ellipsoidal microlenses at single-mode fibers outputs. The proposed method utilizes the controlled mechanical micromachining technique based on the variation of the speed of the fiber around its axis in both X and Y directions followed by the injection of a quantity of polydimethylsiloxane (PDMS) to form the hemi-ellipsoidal microlenses. The experimental results show that this technique allows to obtain a wide variety of ellipticity diameters ratios from 0.68 to 0.84. An elliptical ratio of radii of curvature Ry/Rx in a range of 0.51 at 0.86 is also obtained. In this investigation a mode field diameters MFD in an interval between 3.26 µm and 9.93 µm have been realized. The measurement results demonstrate that the proposed technology allows to fabricate hemi-ellipsoidal microlenses having an MFD ellipticity ratios of about 0.60 to 0.97 in near field promising for micro-collimator suitable to match an elliptical laser beam to the circular one of a fiber.

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“…Еще один распространенный метод оптического согласования -использование в конструкции модуля фокусирующей линзы. В работе [4] предложено разместить на торце ОВ полимерную сферическую микролинзу или применить волоконную линзу, которую возможно получить при помощи травления или плавления конца ОВ [5]. Также используют системы с микролинзой, которую применяют как в конструкции отдельного фотоприемного модуля [6], так и в конструкции оптико-электронных межсоединений на печатной плате [7].…”

Section: Introductionunclassified

Optimization of the optical scheme of a photodetector module operating in the spectral range of 1.3-1.6 μm

Kovach¹,

Andryushkin²,

Kolodeznyi³

et al. 2022

Naučno-teh. vestn. inf. tehnol. meh. opt.

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Optical system consisting of single-mode optical fiber and p-i-n photodiode semiconductor chip with InGaAs active layer was investigated. Considered photodetector module has responsivity in 1.3-1.6 µm. The problem of optical power loss due to inaccurate matching between the optical fiber and the active medium of photodiode in photodetector modules is investigated; resolving the power loss problem will lead to an increase in the spectral photosensitivity and external quantum efficiency of the photodetector module. Optimization of optical fiber coupling with semiconductor chip was implemented in Zemax® software with built-in Levenberg-Marquardt algorithm. Also, numerical calculations of the influence of the transverse and longitudinal displacement on optical coupling efficiency in the photodetector module were carried out. The optical system of photodetector module based on standard metal can package was built in Zemax® software. Optimal distances between elements of the photodetector module were calculated, and maximum efficiency of 93.1 % optical coupling between single-mode fiber and photodiode aperture was achieved. The necessary sensitivity of linear micro translators used during the assembly of photodetector modules was determined to ensure the alignment of optical elements with coupling efficiency more than 90 %. The results of this work can be used in the design of photodetector modules. The proposed solutions can be relatively easily modified to create photodetector modules of other spectral ranges.

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Fabrication of polymer microlenses on single mode optical fibers for light coupling

Cited by 33 publications

References 16 publications

Integrated Concentrators for Scalable High-Power Generation from Colloidal Quantum Dot Solar Cells

Integrated Concentrators for Scalable High-Power Generation from Colloidal Quantum Dot Solar Cells

Hemi-ellipsoidal microlensed fiber based on polishing and polymer technology

Optimization of the optical scheme of a photodetector module operating in the spectral range of 1.3-1.6 μm

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