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Theoretical and experimental investigation of low-volgage and low-loss 25-Gbps Si photonic crystal slow light Mach-Zehnder modulators with interleaved p/n junction

By Yosuke eTerada, Hiroyuki eIto, Hong C Nguyen and Toshihiko eBaba

Abstract

In this study, we investigated the performance of Si lattice-shifted photonic crystal waveguide (LSPCW) Mach-Zehnder modulators theoretically and experimentally. The LSPCW increases the phase shift in modulator to 2.3 - 2.5 times higher, which allows for size reduction and high performance. On-chip passive loss was reduced to less than 5 dB by optimizing each component. We obtained 25 Gbps clear open eye and 3 dB extinction ratio at a drive voltage of 1.5 – 1.75 V for 200 μm phase shifter with linear p/n junction when we added a modulation loss of 7 dB. This modulation loss was reduced to 0.8 dB, maintaining other performance, by employing interleaved p/n junction and optimizing doping concentrations

Topics: optoelectronics, Slow Light, silicon photonics, modulator, photonic crystal waveguides, Physics, QC1-999
Publisher: Frontiers Media S.A.
Year: 2014
DOI identifier: 10.3389/fphy.2014.00061
OAI identifier: oai:doaj.org/article:ca0d5c40e28e4d25a20a59a7502262d8
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