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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 15 — Jul. 25, 2005
  • pp: 5608–5613

Optical filter based on contra-directional waveguide coupling in a 2D photonic crystal with square lattice of dielectric rods

Zhenfeng Xu, Jiangang Wang, Qingsheng He, Liangcai Cao, Ping Su, and Guofan Jin  »View Author Affiliations


Optics Express, Vol. 13, Issue 15, pp. 5608-5613 (2005)
http://dx.doi.org/10.1364/OPEX.13.005608


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Abstract

A coupler-type optical filter in 2D photonic crystal (PhC) with square lattice of dielectric rods in air is presented. The reduced-index and increased-index waveguides of filter have dispersion curves with opposite slopes to realize contra-directional coupling, and the point of anti-crossing is designed below the light line to avoid vertical radiation. The filter has a broad operable bandwidth due to the absence of mini stop bands. The transmission properties are analyzed using coupled modes theory (CMT) and simulated using the finite-difference time-domain (FDTD) method. The results show that a filtering bandwidth of 4 nm can be achieved in the range of 1500∼1600 nm, and over 83% drop coefficient is obtained.

© 2005 Optical Society of America

OCIS Codes
(230.3990) Optical devices : Micro-optical devices
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Research Papers

History
Original Manuscript: June 6, 2005
Revised Manuscript: July 1, 2005
Published: July 25, 2005

Citation
Zhenfeng Xu, Jiangang Wang, Qingsheng He, Liangcai Cao, Ping Su, and Guofan Jin, "Optical filter based on contra-directional waveguide coupling in a 2D photonic crystal with square lattice of dielectric rods," Opt. Express 13, 5608-5613 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-15-5608


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