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Thermal stability enhancement of electrooptic polymer modulator

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5 Author(s)
Park, Suntak ; Basic Res. Lab., ETRI, Taejon, South Korea ; Jung Jin Ju ; Do, Jung Yun ; Park, Seung Koo
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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.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 1 )

Date of Publication:

Jan. 2004

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