Polymer Microlens on Pillar Grown From Single-Mode Fiber Core for Silicon Photonics

Mikami, Osamu; Sato, Ryo; Suzuki, Shinnosuke; Fujikawa, Chiemi

doi:10.1109/lpt.2020.2977394

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…8. The coupling target of our previously proposed coupling device 33) is an ultrahigh numerical aperture fiber (HiNA), UHNA7 of NUFERN, with an MFD similar to that of the conventional SSC of the SiPh chip. The data sheet of NUFERN indicates that the spot size is approximately 3.2 ± 0.3 μm (diameter) at 1.55 μm wavelength and the NA is 0.41.…”

Section: Optimal Shape Of Microlensmentioning

confidence: 99%

“…1 and examined to achieve high coupling efficiency for small spot sizes of silicon photonics. 32,33) In this study, first, the modal characteristics at the pillar part of the coupling device, which comprises a pillar and a microlens on the SMF end-face, were studied. Second, the optical characteristics of the coupling device were evaluated and compared with the theoretically obtained coupling efficiencies.…”

Section: Introductionmentioning

confidence: 99%

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High optical coupling efficiency of polymer microlens and pillar on single mode fiber for silicon photonics

Kamiura

Kurisawa

Fujikawa

et al. 2022

Jpn. J. Appl. Phys.

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Silicon photonics technology has attracted considerable attention these days. However, the low coupling efficiency due to the difference in spot size between silicon photonic (SiPh) chips and single-mode fibers (SMFs) remains a challenging issue. We have already proposed a unique combination of a microlens and a pillar on the facet of SMF. However, the pillar may have difficulty in keeping a single mode for a signal beam of 1. 55 μm wavelength due to air cladding. In this study, we clarified the length of the pillar that can support the single mode through simulations and experiments. By the optimum designing, the spot size as the same level as the SiPh chip was obtained. We could show that our coupling device provides high coupling efficiency with a test sample of SiPh chip, and this device also can be applied to multi-core fibers.

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Section: Optimal Shape Of Microlensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High optical coupling efficiency of polymer microlens and pillar on single mode fiber for silicon photonics

Kamiura

Kurisawa

Fujikawa

et al. 2022

Jpn. J. Appl. Phys.

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“…The array can be square, hexagonal, or any other geometric shape, and the microlenses can be circular, square, or hexagonal. In modern optical systems, MLAs are becoming increasingly essential optical devices in lithography [1], sensing [2], imaging [3], light source [4], and optical fibre communication [5]. Because they exhibit excellent optical characteristics such as reduced aberration distortion, wide field of view (FOV) angles, infinite depth of field, and high homogeneity performance [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the design by optimizing MTF performance of MLA with overlapping aperture

Sreenivasulu

Gowda

Maik

2022

J. Phys.: Conf. Ser.

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In this paper, we introduced a novel microlens array (MLA) design approach with the use of overlapped apertures. The chief ray tracing and paraxial imaging optics are utilised in projection imaging analysis. This work makes MLA structure design requirements more flexible. The proposed design is small and compact. It provides homogeneous illumination over the whole field of view (FOV). In the demonstration, a comparison of the sample 3x3 MLA projector and the proposed 3x3 MLA projector with the same aperture size is illustrated with the help of overlapped apertures. Finally, the proposed MLA projection imaging simulations are accomplished. It substantially outperforms the basic design in terms of FOV and modulation transfer function (MTF). We performed comparative analysis for proposed design with the help of diffraction MTF analysis tool. Our research will aid in the development and exploration of more efficient and advanced compact MLA projection optical systems.

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“…The low efficiency, particularly in the edge coupling scheme, is primarily due to the difference in the spot size of the SiPh chips (3-4 m) and that of SMFs (10 m) [1]. To overcome this problem, researchers have produced coupling devices fabricated on the end face of an SMF [2][3][4][5]. In addition, the connection of SMF and SiPh using a tapered self-written waveguide has been proposed [6][7][8].…”

mentioning

confidence: 99%

Polymer Spot Size Expanders for High Efficiency Optical Coupling in Optical Interconnection

et al. 2022

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Improving the low coupling efficiency due to spot size differences remains a challenge for achieving high bit-rate optical interconnections. To solve this problem, the test spot size expander device is fabricated using UV-curable resin on the end face of a fiber with a high numerical aperture. The expanded spot size of 9.38 μm from the original 3.2 μm at a wavelength of 1.55 μm and the maximum coupling efficiency with a single mode fiber of –1.19 dB are achieved. In addition, the –3 dB tolerance of the coupling efficiency along the vertical optical axis was ±4.1 µm.

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Polymer Microlens on Pillar Grown From Single-Mode Fiber Core for Silicon Photonics

Cited by 8 publications

References 9 publications

High optical coupling efficiency of polymer microlens and pillar on single mode fiber for silicon photonics

High optical coupling efficiency of polymer microlens and pillar on single mode fiber for silicon photonics

Enhancing the design by optimizing MTF performance of MLA with overlapping aperture

Polymer Spot Size Expanders for High Efficiency Optical Coupling in Optical Interconnection

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