Abstract

Photonic wire bonds, i.e., freeform waveguides written by 3D direct laser writing, emerge as a technology to connect different optical chips in fully integrated photonic devices. With the long-term vision of scaling up this technology to a large-scale fabrication process, the in situ optimization of the trajectory of photonic wire bonds is at stake. A prerequisite for the real-time optimization is the availability of a fast loss estimator for single-mode waveguides of arbitrary trajectory. Losses occur because of the bending of the waveguides and at transitions among sections of the waveguide with different curvatures. Here, we present an approach that resides on the fundamental mode approximation, i.e., the assumption that the photonic wire bonds predominantly carry their energy in a single mode. It allows us to predict in a quick and reliable way the pertinent losses from pre-computed modal properties of the waveguide, enabling fast design of optimum paths.

© 2018 Optical Society of America

Approximation method for fast calculation of transmission in multi-mode waveguides

Maria Paszkiewicz, Mariia Sukhova, Willy Dörfler, and Carsten Rockstuhl
J. Opt. Soc. Am. A 41(2) 174-184 (2024)

Design of curved waveguides: the matched bend

Andrea Melloni, Paolo Monguzzi, Raffaella Costa, and Mario Martinelli
J. Opt. Soc. Am. A 20(1) 130-137 (2003)

New formalism of curvature losses of leaky modes in doubly clad slab waveguides

Mitsunobu Miyagi, Shuichi Matsuo, and Shigeo Nishida
J. Opt. Soc. Am. A 4(4) 678-682 (1987)

Low-loss and low-crosstalk multimode waveguide bend on silicon

Xiaohui Jiang, Hao Wu, and Daoxin Dai
Opt. Express 26(13) 17680-17689 (2018)

Quasi-analytic formalism for mode characteristics in highly overmoded rectangular dielectric waveguide bends

Daniel Lenz, Daniel Erni, and Werner Bächtold
J. Opt. Soc. Am. A 22(9) 1968-1975 (2005)