title: Ultra-low loss Si3N4 waveguides with low nonlinearity and high power handling capability.
abstract: We investigate the nonlinearity of ultra-low loss Si3N4-core and SiO2-cladding rectangular waveguides. The nonlinearity is modeled using Maxwell's wave equation with a small amount of refractive index perturbation. Effective n2 is used to describe the third-order nonlinearity, which is linearly proportional to the optical intensity. The effective n2 measured using continuous-wave self-phase modulation shows agreement with the theoretical calculation. The waveguide with 2.8-μm wide and 80-nm thick Si3N4 core has low loss and high power handling capability, with an effective n2 of about 9×10(-16) cm2/W.
authors.affiliation: Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93106, USA. jtien@ece.ucsb.edu
authors.forename: Ming-Chun
authors.initials: MC
authors.lastname: Tien
authors.forename: Jared F
authors.initials: JF
authors.lastname: Bauters
authors.forename: Martijn J R
authors.initials: MJ
authors.lastname: Heck
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Blumenthal
authors.forename: John E
authors.initials: JE
authors.lastname: Bowers