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Thermal stability enhancement of electrooptic polymer modulator
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- Authors
- Suntak Park, Jung Jin Ju, Jung Yun Do, Seung Koo Park, Myung-Hyun Lee
- Issue Date
- 2004-01
- Citation
- IEEE Photonics Technology Letters, v.16, no.1, pp.93-95
- ISSN
- 1041-1135
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- We synthesized a novel electrooptic (EO) polymer with good thermal stability and high optical nonlinearity. The EO polymer has a side-chain structure of a hyper-branched chromophore in polyetherimide. In order to improve the thermal stability, the EO polymer has been designed to have a high glass transition temperature (178 °C). The hyper-branched chromophores induced a large EO coefficient (35 pm/V at 1550 nm). An optical intensity modulator based on the EO polymer was demonstrated. The measured half-wave voltage was 8.5 V and the extinction ratio was 18 dB. The modulator showed good thermal stability at 125 °C.
- KSP Keywords
- 1550 nm, EO coefficient, Electrooptic (EO) polymer, Half-wave voltage, Hyper-branched, Optical intensity modulator, Optical nonlinearity, Side-chain structure, Thermal stability(TGA), extinction ratio, high glass transition temperature