In this work, we develop a simulation method based on
supermode theory and transfer matrix formalism, and then apply it to the
analysis and design of taper couplers for vertically integrated As2S3 and Ti: LiNbO3 hybrid waveguides. Test structures based on taper
couplers are fabricated and characterized. The experimental results confirm the
validity of the modeling method, which in turn, is used to analyze the
fabricated couplers.
References
[1]
M. E. Solmaz, et al., “Compact Bends for Achieving Higher Integration Densities for LiNbO3 Waveguides,” IEEE Photonics Technology Letters, Vol. 21, No. 9, 2009, pp. 557-559. doi:10.1109/LPT.2009.2014569
[2]
M. E. Solmaz, et al., “First Demonstration of an As2S3-on-LiNbO3 Ring Resonator,” Conference on Optical Fiber Communication—Incudes Post Deadline Papers, San Diego, 22-26 March 2009, pp. 1-3.
[3]
J. Haes, et al., “Design of Adiabatic Tapers for High-Contrast Step Index Waveguides,” Linear and Nonlinear Integrated Optics, Lindau, 11-13 April 1994, pp. 685-693.
[4]
L. Ching-Ting, et al., “Design and Analysis of Completely Adiabatic Tapered Waveguides by Conformal Mapping,” Journal of Lightwave Technology, Vol. 15, No. 2, 1997, pp. 403-410.
[5]
F. Xia, et al., “Photonic Integration Using Asymmetric Twin-Waveguide (ATG) Technology: Part I-Concepts and Theory,” IEEE Journal of Selected Topics in Quantum Electronics, Vol. 11, No. 1, 2005, pp. 17-29.
doi:10.1109/JSTQE.2004.841466
[6]
X. Sun, et al., “Adiabaticity Criterion and the Shortest Adiabatic Mode Transformer in a Coupled-Waveguide System,” Optics Letters, Vol. 34, No. 3, 2009, pp. 280-282. doi:10.1364/OL.34.000280
[7]
A. Yariv and X. Sun, “Supermode Si/III-V Hybrid Lasers, Optical Amplifiers and Modulators: A Proposal and Analysis,” Optics Express, Vol. 15, No. 15, 2007, pp. 9147-9151. doi:10.1364/OE.15.009147
[8]
J. Haes, et al., “A comparison between Different Propagative Schemes for the Simulation of Tapered Step Index Slab Waveguides,” Journal of Lightwave Technology, Vol. 14, No. 6, 1996, pp. 1557-1569.
[9]
J.-M. Liu, “Coupling of Waves and Modes,” In: J.-M. Liu, Ed., Photonic Devices, Cambridge University Press, Cambridge, 2005, p. 1052.
