title: Optimized design of polarization-independent and temperature-insensitive broadband optical waveguide coupler by use of fluorinated polyimide.
abstract: A statistically optimized design method suitable for a polariation-independent and temperature-insensitive broadband waveguide coupler is proposed. By use of this method, a fluorinated polyimide waveguide 3-dB waveguide coupler for 1490 to approximately 1610 nm application is designed by optimizing polarization and temperature fluctuation. The validity of the design is verified through simulation based on the three-dimensional beam propagation method (3D-BPM), which revealed a coupling ratio of 50 +/- 0.8% in a 120-nm bandwidth in the temperature range -10 to 40 degrees C for both orthogonal polarizations.
authors.affiliation: College of Optics and Electron Information Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors.forename: Baoxue
authors.initials: B
authors.lastname: Chen
authors.forename: Hongliang
authors.initials: H
authors.lastname: Lu
authors.forename: Dexin
authors.initials: D
authors.lastname: Zhao
authors.forename: Yifang
authors.initials: Y
authors.lastname: Yuan
authors.forename: Mamoru
authors.initials: M
authors.lastname: Iso