Abstract
We have presented a polymer wavelength division multiplexing (WDM) filter based on multimode interference and developed a hybrid integrated optical module for 1.31/1.55-mum bidirectional operation. The active devices were integrated on a silicon optical bench platform by flip-chip bonding technique. The polymer WDM filter chip using polymethylmethacrylate (PMMA) was fabricated by the hot embossing technique. This hybrid module exhibited a bi-directional operation of 2.5 Gb/s with a minimum sensitivity of -20.5 dBm at a bit error rate of 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-10</sup> , an optical crosstalk of -35 dB and the clear eye pattern.
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