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Laser-fabricated low-loss single-mode raised-rib waveguiding devices in polymers

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5 Author(s)
Eldada, L. ; Eng. Mater. Sector, Allied-Signal Inc., Morristown, NJ, USA ; Chengzeng Xu ; Stengel, K.M.T. ; Shacklette, L.W.
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Organic polymeric materials offer a versatile medium for the creation of low-cost large-area optical guided-wave structures. In this work, we report on the use of a novel maskless laser-based microfabrication technique for the photochemical delineation of raised-rib single-mode waveguiding devices in polymers. This technology relies on accurate control of small refractive index differences (which is achieved by using intermiscible acrylate monomers), use of high-contrast photochemical response, as well as precise control of laser writing parameters. The devices reported here have cross-sectional dimensions and numerical apertures that match single-mode glass optical fibers. They exhibit very low losses of 0.03 dB/cm at 840 nm and exceptional thermal stability. We present the operational characteristics of bends, Y-branches, and directional couplers fabricated using this technology and compare these characteristics with those predicted from theory

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Lightwave Technology, Journal of  (Volume:14 ,  Issue: 7 )