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Planar hybrid polymer-silica microlenses with tunable beamwidth and focal length

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5 Author(s)
Glebov, A.L. ; Fujitsu Labs. of America Inc., Sunnyvale, CA, USA ; Lidu Huang ; Aoki, S. ; Lee, M.
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Thermally tunable planar microlenses have been fabricated with a hybrid process utilizing silica-on-silicon and polymer planar lightwave circuit technologies. The silica microlens has a double concave gap filled with an optical polymer. The lens collimates the light beam with a beamwidth of less than 450 μm at distances up to 100 mm. The experiments presented demonstrate that by varying the lens temperature in a range of 60°C the beamwidth can be tuned by ±40% at different distances from the lens. The beam-propagation-method simulations show that adjusting the lens curvature can control the beamwidth tunability range and thermal sensitivity. That allows optimization of the lens designs for different applications.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 4 )

Date of Publication:

April 2004

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