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Optimized design of polarization-independent and temperature-insensitive broadband optical waveguide coupler by use
Baoxue Chen1, Hongliang Lu, Dexin Zhao
1College of Optics and Electron Information Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
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.
