Generalized representation of a coupled mode equation using a normalized coordinate system

✍ Scribed by Yoshihiro Emori; Tetsuya Mizumoto; Yoshiyuki Naito

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 773 KB
• Volume: 80
• Category: Article
• ISSN: 8756-663X
• DOI: 10.1002/(sici)1520-6432(199703)80:3<60::aid-ecjb7>3.0.co;2-b

✦ Synopsis

SUMMARY
Mode coupling theory describes light propagation characteristics in coupled systems composed of several waveguides. It becomes possible to determine light propagation characteristics by solving differential equations called coupled equations. For determination of the propagation constant and coupling coefficients which are elements of the coupled equations, waveguide parameters and light wavelength must be given. Therefore, when the refractive index and wavelength are changed, different coupled equations must be solved. In this paper, a normalized scale is introduced which takes the refractive index and wavelength into account, and the coupled equations are derived in such a (normalized) coordinate system. It is shown that even if the wavelength and refractive indices are changed, the coupling characteristics of the coupled systems with the same configuration in normalized space can be determined from the same coupled equations. (c) 1997 Scripta Technica, Inc. Electron Comm Jpn Pt 2, 80(3): 60-68, 1997