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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 24 — Nov. 22, 2010
  • pp: 24504–24509

1x4 reconfigurable demultiplexing filter based on free-standing silicon racetrack resonators

Po Dong, Wei Qian, Hong Liang, Roshanak Shafiiha, Xin Wang, Dazeng Feng, Guoliang Li, John E. Cunningham, Ashok V. Krishnamoorthy, and Mehdi Asghari  »View Author Affiliations


Optics Express, Vol. 18, Issue 24, pp. 24504-24509 (2010)
http://dx.doi.org/10.1364/OE.18.024504


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Abstract

We present a 1x4 reconfigurable demultiplexing filter based on cascaded thermally tunable silicon racetrack resonators with ultralow tuning powers. The use of free-standing silicon resonators with undercut structures significantly reduces the tuning power, with a figure of ~2.9 mW per free spectral range. Even with the presence of thermal crosstalk between two adjacent resonators, we demonstrate multiplexing functionality for channel spacings of 200 GHz, 100 GHz, and 50 GHz, with channel wavelengths aligned to International Telecommunication Union (ITU) grid specifications. Crosstalk values for 200 GHz and 50 GHz channel spacings are less than −20 dB and −11.5 dB, respectively. The total power to achieve this performance is in the range of 1.84 mW to 2.4 mW. Such low-power, compact, and reconfigurable filters are particularly useful in chip-scale optical interconnects.

© 2010 OSA

OCIS Codes
(200.4650) Optics in computing : Optical interconnects
(230.3120) Optical devices : Integrated optics devices
(230.5750) Optical devices : Resonators
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Optical Devices

History
Original Manuscript: September 14, 2010
Revised Manuscript: October 21, 2010
Manuscript Accepted: October 28, 2010
Published: November 9, 2010

Citation
Po Dong, Wei Qian, Hong Liang, Roshanak Shafiiha, Xin Wang, Dazeng Feng, Guoliang Li, John E. Cunningham, Ashok V. Krishnamoorthy, and Mehdi Asghari, "1x4 reconfigurable demultiplexing filter based on free-standing silicon racetrack resonators," Opt. Express 18, 24504-24509 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-24-24504


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