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A new scheme of oriented-hyperboloid microlens (OHM) with passive alignment to achieve high polarized extinction ratio (PER) is proposed and demonstrated high efficiency coupling of high-power 980 nm pump lasers to polarization maintaining fibers (PMFs). Using an automatic grinding machine and a charge-coupled-device to precisely control and attain the required minor radius of curvature 4–4.8 μm,...
A new scheme of hyperboloid microlens (HM) having precise controlling minor radius of curvature is demonstrated. The HMs exhibited high-average coupling of 83% which was better than any other grinding techniques to form asymmetric microlenses.
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 high-average coupling efficiency of 84.5%. This study demonstrates that the proposed ASMs through a single-step grinding technique...
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