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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 3633–3650

Silicon photonic grating-assisted, contra-directional couplers

Wei Shi, Xu Wang, Charlie Lin, Han Yun, Yang Liu, Tom Baehr-Jones, Michael Hochberg, Nicolas A. F. Jaeger, and Lukas Chrostowski  »View Author Affiliations

Optics Express, Vol. 21, Issue 3, pp. 3633-3650 (2013)

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We demonstrate, in both theory and experiment, 4-port, electrically tunable photonic filters using silicon contra-directional couplers (contra-DCs) with uniform and phase-shifted waveguide Bragg gratings. Numerical analysis, including both intra- and inter-waveguide couplings, is performed using coupled-mode theory and the transfer-matrix method. The contra-DC devices were fabricated by a CMOS-photonics manufacturing foundry and are electrically tunable using free-carrier injection. A 4-port, grating-based photonic resonator has been obtained using the phase-shifted contra-DC, showing a resonant peak with a 3-dB bandwidth of 0.2 nm and an extinction ratio of 24 dB. These contra-DC devices enable on-chip integration of Bragg-grating-defined functions without using circulators and have great potential for applications such as wavelength-division multiplexing networks and optical signal processing.

© 2013 OSA

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(050.5080) Diffraction and gratings : Phase shift
(130.3120) Integrated optics : Integrated optics devices
(140.4780) Lasers and laser optics : Optical resonators
(130.4815) Integrated optics : Optical switching devices

ToC Category:
Integrated Optics

Original Manuscript: December 7, 2012
Revised Manuscript: January 19, 2013
Manuscript Accepted: January 22, 2013
Published: February 5, 2013

Wei Shi, Xu Wang, Charlie Lin, Han Yun, Yang Liu, Tom Baehr-Jones, Michael Hochberg, Nicolas A. F. Jaeger, and Lukas Chrostowski, "Silicon photonic grating-assisted, contra-directional couplers," Opt. Express 21, 3633-3650 (2013)

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