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Polymeric waveguide polarization splitter with a buried birefringent polymer

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3 Author(s)
Min-Cheol Oh ; Electron. & Telecommun. Res. Inst., Taejon, South Korea ; Lee, Myung-Hyun ; Hyung-Jong Lee

A waveguide polarization splitter is demonstrated based on a low-loss polymer waveguide and a birefringent polyimide. Crosslinkable fluorinated polymers with an excellent stability and a low absorption loss are utilized for the device. The polyimide is buried under one branch of the Y-branch waveguide to enhance the birefringence between the TE and TM modes. By the adiabatic mode evolution, the TE mode is coupled to the branch with the polyimide strip, while the TM mode propagates through the other branch without the polyimide. For the device with a branch angle of 1/400 rad, we obtained a crosstalk less than -20 dB and a fiber-to-fiber insertion loss of 3.8 dB.

Published in:

Photonics Technology Letters, IEEE  (Volume:11 ,  Issue: 9 )

Date of Publication:

Sept. 1999

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