Integrated optical coupler

摘要

The invention is directed to an integrated (2x2) optical coupler including input waveguides (21, 22) approaching each other at an angle PHI and having different propagation constants and widths (w1, w2), minimum web widths S (approximately 4 mu m) and output waveguides (23, 24) of the same width w0. The output waveguides include circular arc segments which connect to the respective input waveguides with abrupt steps. Both directions are the same. Attenuation is avoided where the waveguides come close to each other in the interaction region and arcuate segments in the narrow waveguide 21 are avoided. The optical coupler according to the invention can be used in branching devices and especially in a 2xN branching device and in Mach-Zehnder duplexers.