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Multimode polymer waveguides constitute a promising technology for use in board-level optical interconnects. However, the continuous improvements in high-speed performance of VCSELs raise important questions about their ability to support such high data rates due to their inherent highly multimoded nature. Thorough experimental studies on the bandwidth of a 1.4-m-long multimode spiral waveguide are presented in this letter, indicating a bandwidth-length product of at least 35 GHz×m even in the case of an overfilled launch. No significant transmission impairments are observed for spatial input offsets, while error-free (BER <; 10<sup>-12</sup>) data transmission over the 1.4-m-long spiral waveguide is demonstrated at 25 Gb/s.

ieee photonics technology letters

Bandwidth Studies on Multimode Polymer Waveguides for <inline-formula> <tex-math notation="TeX">\({\ge }25\) </tex-math></inline-formula> Gb/s Optical Interconnects

Bandwidth Studies on Multimode Polymer Waveguides for \({\ge }25\) Gb/s Optical Interconnects