The self-imaging phenomena in multimode Bragg reflection waveguides (BRWs) have been predicted and investigated by using the plane-wave expansion method and the finite-difference time-domain method. A compact wavelength splitter based on self-imaging principles in BRWs is presented, and its transmission characteristics are investigated by using the finite-difference time-domain method. Calculated results indicate that, for the wavelength splitter without any waveguide bend optimizations, two optical waves with different wavelengths can be spatially separated, and corresponding transmittances are 95.6% and 90.1%, respectively. The simple and compact wavelength splitter is expected to be applied to highly dense photonic integrated circuits.
© 2012 Optical Society of America
Original Manuscript: June 12, 2012
Revised Manuscript: August 29, 2012
Manuscript Accepted: September 9, 2012
Published: October 10, 2012
Bing Chen, Lin Huang, Yongdong Li, Chunliang Liu, and Guizhong Liu, "Compact wavelength splitter based on self-imaging principles in Bragg reflection waveguides," Appl. Opt. 51, 7124-7129 (2012)