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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 29 — Oct. 10, 2009
  • pp: 5598–5603

Broadband tunable bandpass filters using phase shifted vertical side wall grating in a submicrometer silicon-on-insulator waveguide

P. Prabhathan, V. M. Murukeshan, Zhang Jing, and Pamidighantam V. Ramana  »View Author Affiliations

Applied Optics, Vol. 48, Issue 29, pp. 5598-5603 (2009)

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We propose the silicon-on-insulator (SOI) based, phase shifted vertical side wall grating as a resonant transmission filter suitable for dense wavelength division multiplexing (DWDM) communication channels with 100 GHz channel spacing. The gratings are designed and numerically simulated to obtain a minimum loss in the resonant cavity by adjusting the grating parameters so that a high transmittivity can be achieved for the resonant transmission. The resonant grating, which is designed to operate in the DWDM International Telecommunication Union (ITU) grid C band of optical communication, has a high free spectral range of 51.7 nm and a narrow band resonant transmission. The wavelength selectivity of the filter is improved through a coupled cavity configuration by applying two phase shifts to the gratings. The observed channel band width and channel isolation of the resonant transmission filter are good and in agreement with the ITU specifications.

© 2009 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(050.5080) Diffraction and gratings : Phase shift
(060.4510) Fiber optics and optical communications : Optical communications
(130.3120) Integrated optics : Integrated optics devices
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Integrated Optics

Original Manuscript: June 17, 2009
Revised Manuscript: September 11, 2009
Manuscript Accepted: September 18, 2009
Published: October 6, 2009

P. Prabhathan, V. M. Murukeshan, Zhang Jing, and Pamidighantam V. Ramana, "Broadband tunable bandpass filters using phase shifted vertical side wall grating in a submicrometer silicon-on-insulator waveguide," Appl. Opt. 48, 5598-5603 (2009)

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