SYSTEMATIC DESIGN OF MICROPRISM-TYPE LOW-LOSS STEP-INDEX BENT WAVE-GUIDES

By taking into account the curved travel path instead of the conventio nal abrupt optical line path in the bent region of three-dimensional e mbedded structures, we propose two kinds of microprism-type waveguide bends and systematically derive precise phase compensation formulas. T he simulation results obtained with the fast Fourier-transform beam pr opagation method indicate that the normalized transmitted powers are g reater than 95% even though the bent angle is as large as 10 degrees. (C) 1998 Optical Society of America.