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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 1 — Jan. 1, 2010
  • pp: 61–63

Compact all-optical tunable filter with embedded preamplifier and channel selector based on cross-Raman scattering in an Si nanowire waveguide

Siamak Abdollahi and Mohammad K. Moravvej-Farshi  »View Author Affiliations

Optics Letters, Vol. 35, Issue 1, pp. 61-63 (2010)

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We propose a novel and compact all-optical tunable filter with embedded preamplifier and channel selector. This filter is based on cross-Raman scattering (XRS) in a silicon nanowire waveguide, suitable for multichannel optical communications. Tuning is performed by means of tuning the pump center wavelength. With this tuning approach the separation between the pump wavelength and that of the desired channel should equal the Raman shift in Si. Spanning over 40 optical communication channels following the ITU-T G.694.1 standard ( 100 GHz grid), our simulation results have demonstrated an excellent channel selectivity and tunabilty for the proposed all-optical filter. The XRS process in Si nanowire has amplified the desired channel by about 11.5 ± 0.38 dB , while the suppression ratios for the first and the second neighboring channels are about 28 ± 0.25 and 33.6 ± 0.31 dB , respectively.

© 2009 Optical Society of America

OCIS Codes
(190.5650) Nonlinear optics : Raman effect
(230.1150) Optical devices : All-optical devices
(230.7370) Optical devices : Waveguides
(230.7408) Optical devices : Wavelength filtering devices

ToC Category:
Optical Devices

Original Manuscript: August 10, 2009
Revised Manuscript: November 19, 2009
Manuscript Accepted: November 23, 2009
Published: December 24, 2009

Siamak Abdollahi and Mohammad K. Moravvej-Farshi, "Compact all-optical tunable filter with embedded preamplifier and channel selector based on cross-Raman scattering in an Si nanowire waveguide," Opt. Lett. 35, 61-63 (2010)

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