We theoretically investigate waveguide power splitters with parallel output ports by the time-domain coupled-mode theory. Conditions for perfect transmission and zero reflection are obtained that are different from the idea of a structure with a perfect T-type branch and two perfect bends. Using theoretical analysis, waveguide power splitters in two-dimensional square-lattice photonic crystals are modeled and optimized. Their transmission properties are simulated by using the finite-difference time-domain method, and an excellent agreement has been found with the present analysis.
© 2009 Optical Society of America
Original Manuscript: September 21, 2009
Manuscript Accepted: October 27, 2009
Published: November 30, 2009
Jianhong Zhou, Qing Chang, Da Mu, Jinhua Yang, Wenbo Han, and Lu Wang, "Theoretical investigation of waveguide power splitters with parallel output ports in two-dimensional square-lattice photonic crystals," J. Opt. Soc. Am. B 26, 2469-2472 (2009)