Abstract
AbstractIt is proposed that the tapered optical waveguide be analyzed by the nonopen system treatment method in which hypothetical boundary walls (electric or magnetic walls) are added to the exterior of the open‐type waveguides. In addition, the step‐approximation method is used for analyzing the single‐mode slab optical waveguide taper. It is shown here that the basic properties of tapers, in which the TE mode propagates, for example, the radiation power and pattern as well as power distribution on the waveguide cross section, can be obtained. The conditions that allow the open‐type tapered waveguide to be treated as a nonopen system are investigated numerically. This paper shows that for long tapers, the hypothetical walls must be farther away from the waveguide, whereas for obtaining the radiation power and pattern, as well as the radiation field, these walls do not have to be separated considerably from the waveguide. Moreover, it is seen that not all the propagating modes need to be used in calculations; even if only about 10 modes are chosen, the radiation power and field distribution can be obtained without loss of accuracy and within a short computation time.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Electronics and Communications in Japan (Part I: Communications)
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
