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Design and fabrication of aspherical microlenses used for ...

An aspherical microlens has a small diameter of about 780 µm and a numerical aperture of 0.275. The fabrication and assembly of the microlens fiber-optic connector have been considered. The optical coupling characteristics of the microlens fiber-optic connector are evaluated by Light Tools software with a coupling loss of-0.80 dB.

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Effect of grinding offset and radius of curvature on ...

We demonstrate a new scheme of aspherical microlens (ASM). By employing a singlestep grinding with fully automatic technique to precisely and quantitatively control the grinding offset less than 0.5 μm and minor radius of curvature within 2.4–3.5 μm, the ASMs exhibited a …

A New Scheme of Aspherical Microlense for Efficient ...

PDF | We propose and demonstrate a new scheme of aspherical microlens (ASM) employing a singlestep grinding technique with fully automated process for …

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US 5546487 A - Cylindrical fiber coupling lens with ...

However, no matter how close one places such fiber waveguides to such a collimating lens, off axis rays may still fall outside the acceptance angle of the fiber waveguides. Moreover, cylindrical fiber lenses with round or other conic cross-sections may correct well on-axis but quickly degrade off-axis. This affects coupling efficiency adversely.

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An Aspherical Microlense Employing Fully Automated Process ...

for Efficient Coupling High-Power Lasers to Fibers Yu-Da Liu 1, ... a new scheme of an aspherical microlens (ASM) employing a single-step grinding technique ... The fiber grinder employed to ...

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OSA | Effect of Grinding Offset and Radius of Curvature on ...

We demonstrate a new scheme of aspherical microlens (ASM). By employing a single-step grinding with fully automatic technique to precisely and quantitatively control the grinding offset less than 0.5 µm and minor radius of curvature within 2.4 - 3.5 µm, the ASMs exhibited a high-average coupling efficiency of 84.5%. This study demonstrates that the proposed ASMs through a single-step ...

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OSA | A New Scheme of Aspherical Microlense for Efficient ...

Mar 10, 2011· Y. Liu, Y. Lu, Y. Tsai, L. Wang, S. Yeh, and W. Cheng, "A New Scheme of Aspherical Microlense for Efficient Coupling High-Power Lasers to Fibers," in Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2011, OSA Technical Digest (CD) (Optical Society of America, 2011), paper JThA4.

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What is Aspherical Lens?|Sumita Optical Glass

Problems of Aspherical Lens and Solutions . But, this aspherical lens also has a problem. Because aspherical lens shape is complicated, it makes difficult to produce lens by grinding such lenses in the past. Thus, actualization has been late. Then, glass preform material near finished shape is placed on aspherical lens molding tool.

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Aspherical Cylindrical Lens|Sumita Optical Glass

Aspherical Cylindrical Lens. We actualized aspherical cylindrical lens with precision molding, which was difficult productions by grinding methods in the past. There is few individual differences of producing by molding tools, and became possible for mass productions.

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