Authors:
Vítor A. Amorim
1
;
João M. Maia
1
;
D. Alexandre
2
and
P. V. S. Marques
1
Affiliations:
1
INESC TEC and University of Porto, Portugal
;
2
INESC TEC and University of Trás-os-Montes e Alto Douro, Portugal
Keyword(s):
Femtosecond Laser, Laser Direct Writing, Integrated Optics, Optical Waveguide, Multimode Interference
Device, Power Splitter.
Related
Ontology
Subjects/Areas/Topics:
Optical Communications and Networking
;
Optics
;
Photonics, Optics and Laser Technology
Abstract:
1xN (N=2, 3, 4) MMI power splitters were fabricated in a fused silica substrate by laser direct writing, using
a focused 515 nm amplified femtosecond laser beam, and characterized at 1550 nm. To accomplish this,
several low loss waveguides were fabricated side by side to form a multimode waveguide with the output in
a polished facet of the substrate, while a single low loss waveguide was fabricated to inject light in the
centre of the multimode waveguide. The performance of the fabricated devices was optimized by testing
three different designs.