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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 22 — Nov. 1, 2004
  • pp: 5518–5525

Highly efficient photonic crystal-based multichannel drop filters of three-port system with reflection feedback

Sangin Kim, Ikmo Park, Hanjo Lim, and Chul-Sik Kee  »View Author Affiliations


Optics Express, Vol. 12, Issue 22, pp. 5518-5525 (2004)
http://dx.doi.org/10.1364/OPEX.12.005518


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Abstract

We have derived the general condition to achieve 100% drop efficiency in the resonant tunneling-based channel drop filters of a three-port system with reflection feedback. According to our theoretical modeling based on the coupled mode theory in time, the condition is that the Q-factor due to coupling to a bus port should be twice as large as the Q-factor due to coupling to a drop port and the phase retardation occurring in the round trip between a resonator and a reflector should be a multiple of 2π. The theoretical modeling also shows that the reflection feedback in the three-port channel drop filters brings about relaxed sensitivity to the design parameters, such as the ratio between those two Q-factors and the phase retardation in the reflection path. Based on the theoretical modeling, a five-channel drop filter has been designed in a two-dimensional photonic crystal, in which only a single reflector is placed at the end of the bus waveguide. The performance of the designed filter has been numerically calculated using the finite-difference time domain method. In the designed filter, drop efficiencies larger than 96% in all channels have been achieved.

© 2004 Optical Society of America

OCIS Codes
(130.1750) Integrated optics : Components
(230.3120) Optical devices : Integrated optics devices

ToC Category:
Research Papers

History
Original Manuscript: August 27, 2004
Revised Manuscript: October 22, 2004
Published: November 1, 2004

Citation
Sangin Kim, Ikmo Park, Hanjo Lim, and Chul-Sik Kee, "Highly efficient photonic crystal-based multichannel drop filters of three-port system with reflection feedback," Opt. Express 12, 5518-5525 (2004)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-12-22-5518


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References

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