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Optimized design of temperature-insensitive optical waveguide coupler with 120-nm bandwidth using fluorinated
Baoxue Chen1, Hongliang Lu, Dexin Zhao
1College of Optics and Electronic Information Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
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.
