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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 17 — Aug. 16, 2010
  • pp: 18067–18076

Eight-channel reconfigurable microring filters with tunable frequency, extinction ratio and bandwidth

Hao Shen, Maroof H. Khan, Li Fan, Lin Zhao, Yi Xuan, Jing Ouyang, Leo T. Varghese, and Minghao Qi  »View Author Affiliations

Optics Express, Vol. 18, Issue 17, pp. 18067-18076 (2010)

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We demonstrate an eight-channel reconfigurable optical filter on a silicon chip. It consists of cascaded microring resonators and integrated compact heaters. With an embedded Mach-Zehnder (MZ) arm coupling to a microring resonator, the important parameters of a filter such as center frequency, extinction ratio and bandwidth can be controlled simultaneously for purposes of filtering, routing and spectral shaping. Thus our device could potentially be useful in dense wavelength division multiplexing (DWDM) and radio frequency arbitrary waveform generation (RFAWG). Multichannel filter response was successfully tuned to match the International Telecommunication Unit (ITU) grid with 50, 100 and 200GHz in channel spacing. Programmable channel selectivity was demonstrated by heating the MZ arm, and continuous adjustment of through-port extinction ratio from 0dB to 27dB was achieved. Meanwhile, the 3dB bandwidth in the drop port changed from 0.12nm to 0.16nm. The device had an ultra-compact footprint (1200μm×100μm) excluding the metal leads and contact pads, making it suitable for large scale integration.

© 2010 OSA

OCIS Codes
(230.5750) Optical devices : Resonators
(250.5300) Optoelectronics : Photonic integrated circuits
(220.4241) Optical design and fabrication : Nanostructure fabrication

ToC Category:
Integrated Optics

Original Manuscript: June 29, 2010
Revised Manuscript: July 27, 2010
Manuscript Accepted: July 30, 2010
Published: August 6, 2010

Hao Shen, Maroof H. Khan, Li Fan, Lin Zhao, Yi Xuan, Jing Ouyang, Leo T. Varghese, and Minghao Qi, "Eight-channel reconfigurable microring filters with tunable frequency, extinction ratio and bandwidth," Opt. Express 18, 18067-18076 (2010)

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