title: Optimized design of temperature-insensitive optical waveguide coupler with 120-nm bandwidth using fluorinated polyimide.
abstract: Method for designing optimized temperature-insensitive optical waveguide couplers by use of fluorinated polyimide is presented. Based on measured temperature and dispersion characteristics of fluorinated polyimide, a 3-dB waveguide coupler with a 120-nm bandwidth with minimal temperature variance is designed and verified through simulation based on three-dimensional beam propagation. The coupling ratio of the theoretical device is 50 +/- 0.7% in the waveband 1490 to approximately 1610 nm and the temperature range -10 to approximately 40 degrees C.
authors.affiliation: College of Optics and Electronic 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