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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 25, Iss. 8 — Aug. 1, 2007
  • pp: 2187–2197

Demonstration of Flat-Passband Multi/Demultiplexer Using Multi-Input Arrayed Waveguide Grating Combined With Cascaded Mach–Zehnder Interferometers

Koichi Maru, Tetsuya Mizumoto, and Hisato Uetsuka

Journal of Lightwave Technology, Vol. 25, Issue 8, pp. 2187-2197 (2007)


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Abstract

We demonstrate multi/demultiplexers with a very flat passband and small excess loss using a multi-input arrayed waveguide grating combined with a cascaded Mach–Zehnder interferometer structure. We also analyze the impact of coupling between input waveguides just before the input slab on chromatic dispersion and investigate a waveguide structure for reducing the chromatic dispersion. We fabricated flat-passband multi/demultiplexers with 100-GHz channel spacing using 2.5%-Δ silica waveguides and experimentally investigated the dependence of their optical characteristics on design parameters to demonstrate the effectiveness of the proposed theoretical model. We obtained a very flat passband response having a 1-dB bandwidth of 0.645–0.658 nm and 20-dB bandwidth of 0.944–0.960 nm with a loss penalty due to the passband-flattening of 0.9–1.0 dB and chromatic dispersion of -22.1–17.5 ps/nm over 0.5 nm in the passband. The measured passband shape and chromatic dispersion generally agreed with the simulation results.

© 2007 IEEE

Citation
Koichi Maru, Tetsuya Mizumoto, and Hisato Uetsuka, "Demonstration of Flat-Passband Multi/Demultiplexer Using Multi-Input Arrayed Waveguide Grating Combined With Cascaded Mach–Zehnder Interferometers," J. Lightwave Technol. 25, 2187-2197 (2007)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-25-8-2187

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