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Fabrication of low-loss optical-quality polymer waveguide facets in multilayer polymer devices using an inductively coupled plasma

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4 Author(s)
Diffey, W.M. ; U.S. Army Res., Dev., & Eng. Command, Weapons Sci. Directorate, Arsenal, AL, USA ; Trimm, R.H. ; Temmen, M.G. ; Ashley, P.R.

A systematic study of the etching of multilayer polymer stacks using an inductively coupled plasma (ICP) has been performed. The optimized parameters were used to etch smooth vertical features in a three-layer polymer device, which are suitable for use as low-loss waveguide facets. Waveguide facets of sufficient optical quality to allow the direct coupling of the output from an actively aligned super luminescent diode (SLD) with a coupling efficiency of 40% have been demonstrated. The ability to fabricate optical-quality waveguide facets through a dry etching process, rather than mechanical means such as dicing, can enable the production of compact highly integrated optical devices.

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Lightwave Technology, Journal of  (Volume:23 ,  Issue: 4 )