Time-domain wave propagation in optical structures

• Published in: IEEE photonics technology letters Vol. 6; no. 8; pp. 1001 - 1003
• Main Authors: Chan, R.Y., Liu, J.M.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.1994; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Circuit properties; Electric, optical and optoelectronic circuits; Electromagnetic propagation; Electromagnetic transients; Electromagnetic waveguides; Electronics; Exact sciences and technology; Finite difference methods; Frequency; Integrated optics. Optical fibers and wave guides; Optical and optoelectronic circuits; Optical propagation; Optical waveguides; Partial differential equations; Pulse modulation; Time domain analysis; Electric field; Field distribution; Time domain method; Wave propagation; Theoretical study; Optical waveguide; Padé approximation
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/68.313076

To make time-domain computation more efficient in optical structures, the wave equation is rewritten to track only the envelope of the electric field. The resultant equation is complex in nature and it is solved via a mapping concept and a Pade approximation. Compared to the finite-difference time-domain algorithm, this method takes two orders of magnitude less memory. This method is applied to the propagation of a 500 fsec pulse in a waveguide over 2 mm. Transient behavior and the effects of waveguide parameters are demonstrated.< >