Synthesis of a photo-crosslinked stable nonlinear optical polymer and application to external electro-optic measurement
✍ Scribed by Daming Zhang; Jingzhi Sun; Jiacong Shen; Maobin Yi
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 170 KB
- Volume
- 77
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
A photo-crosslinked side-chain second-order nonlinear optical polymer was synthesized with bis-phenol-A as the polymer backbone, p-nitroaniline as the chromophore and cinnamyl group as the photo-sensitizer. The characterization of the polymer was made by nuclear magnetic resonance, infrared, ultraviolet-vis, and dynamic mechanical analysis methods. An electro-optic film was obtained by spin coating of the polymer and corona poling then photo-crosslinking reaction. An external electrooptic measurement system was established based on the film and reflective light path configuration, and successfully applied to measure the electrical signals propagating on the under-test circuits. The poled and crosslinked film showed high glass transition temperature (160°C) and improved chromophore orientation stability. The measuring principle was analyzed by electro-optic tensor matrix and index ellipsoid methods. The results showed that the designed polymer film had the linear electro-optic effect, the voltage sensitivity of the system was measured to be 5 mv/ ͌ Hz at the condition of 1 kHz input signal.