23 January 1997 Optimized design and fabrication of integrated optic 1x32 and 2x32 multifunnel power splitters in polymer
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We present the optimized design and the fabrication of an integrated-optic 1 by 32 multifunnel power splitter and the extension to a 2 by 32 splitter of the same type which we are the first to report. This splitter type operates by receiving the radiated input power at the end of a slab waveguide by funnel shaped waveguides of increasing width to compensate for the power decrease towards the outer parts. Using cycle of BPM simulation and adapting the width of the receiver waveguides according to the calculated intensity distribution we achieved a maximum excess loss of 0.5 dB in the simulation. The 2 by 32 splitter was designed using two input waveguides placed symmetrically 8 micrometers off-center and facing the center of the receiver region. Both splitters were fabricated by UV exposure of PMMA with photo initiator BDK. The realized 1 by 32 splitter shows an excess loss of 0.7 dB compared to a reference waveguide and a standard deviation of 0.5 dB with a maximum loss of 1.8 dB at (lambda) equals 1320 nm, the 2 by 32 splitter has 1.3 dB excess loss, 0.8 dB standard deviation and 2.5 dB maximum loss.
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Winfried Bernhard, Winfried Bernhard, Christoph A. Waechter, Christoph A. Waechter, Lars Friedrich, Lars Friedrich, Andreas H. Braeuer, Andreas H. Braeuer, Wolfgang Karthe, Wolfgang Karthe, "Optimized design and fabrication of integrated optic 1x32 and 2x32 multifunnel power splitters in polymer", Proc. SPIE 2997, Integrated Optics Devices: Potential for Commercialization, (23 January 1997); doi: 10.1117/12.264136; https://doi.org/10.1117/12.264136

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