Finite-difference time-domain analysis of deformed square cavity filters with a traveling-wave-like filtering response by mode coupling
Optics Letters, Vol. 32, Issue 8, pp. 967-969 (2007)
http://dx.doi.org/10.1364/OL.32.000967
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Abstract
An add–drop filter based on a perfect square resonator can realize a maximum of only 25% power dropping because the confined modes are standing-wave modes. By means of mode coupling between two modes with inverse symmetry properties, a traveling-wave-like filtering response is obtained in a two-dimensional single square cavity filter with cut or circular corners by finite-difference time-domain simulation. The optimized deformation parameters for an add–drop filter can be accurately predicted as the overlapping point of the two coupling modes in an isolated deformed square cavity. More than 80% power dropping can be obtained in a deformed square cavity filter with a side length of
© 2007 Optical Society of America
OCIS Codes
(120.2440) Instrumentation, measurement, and metrology : Filters
(230.3120) Optical devices : Integrated optics devices
(230.3990) Optical devices : Micro-optical devices
(230.5750) Optical devices : Resonators
(230.7020) Optical devices : Traveling-wave devices
(230.7370) Optical devices : Waveguides
ToC Category:
Optical Devices
History
Original Manuscript: January 2, 2007
Revised Manuscript: January 20, 2007
Manuscript Accepted: January 21, 2007
Published: March 19, 2007
Citation
Qin Chen, Yue-De Yang, and Yong-Zhen Huang, "Finite-difference time-domain analysis of deformed square cavity filters with a traveling-wave-like filtering response by mode coupling," Opt. Lett. 32, 967-969 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-8-967
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