Compact spot-size converters with fiber-matched antiresonant reflecting optical waveguides.
We propose a concept for InGaAsP-InP 1.55-microm lasers integrated with spot-size converters based on modal interference between the modes of the structure formed by an active waveguide and an underlying fiber-matched antiresonant reflecting optical waveguide. Simulation results show that the spot-size converters exhibit low transformation loss, and narrowed far-field emission patterns (10 degrees x 20 degrees) and reduce the coupling loss to standard single-mode fibers from 8 to 2.6 dB over lengths approximately 200 microm shorter than the adiabatic concept. A tolerant design to fabrication variations is also proposed, which could be realized by standard processing techniques.
Galarza
Marko
M
Department of Information Technology, Ghent University-Interuniversity Microelectronics Center, St.-Pietersnieuwstraat 41, Ghent B-9000, Belgium. mgalarza@intec.rug.ac.be
De Mesel
Kurt
K
Baets
Roel
R
Martínez
Alfredo
A
Aramburu
Cándido
C
López-Amo
Manuel
M