title: Compact spot-size converters with fiber-matched antiresonant reflecting optical waveguides.
abstract: 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.
authors.affiliation: Department of Information Technology, Ghent University-Interuniversity Microelectronics Center, St.-Pietersnieuwstraat 41, Ghent B-9000, Belgium. mgalarza@intec.rug.ac.be
authors.forename: Marko
authors.initials: M
authors.lastname: Galarza
authors.forename: Kurt
authors.initials: K
authors.lastname: De Mesel
authors.forename: Roel
authors.initials: R
authors.lastname: Baets
authors.forename: Alfredo
authors.initials: A
authors.lastname: Martínez
authors.forename: Cándido
authors.initials: C
authors.lastname: Aramburu
authors.forename: Manuel
authors.initials: M
authors.lastname: López-Amo