Title :
Thermal stability enhancement of electrooptic polymer modulator
Author :
Park, Suntak ; Ju, Jung Jin ; Do, Jung Yun ; Park, Seung Koo ; Myung-Hyun Lee
Author_Institution :
Basic Res. Lab., ETRI, Taejon, South Korea
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.
Keywords :
electro-optical modulation; glass transition; intensity modulation; optical communication equipment; optical polymers; thermal stability; 125 degC; 1550 nm; 178 degC; 8.5 V; electrooptic polymer modulator; extinction ratio; glass transition temperature; good thermal stability; half-wave voltage; high optical nonlinearity; hyper-branched chromophore; large EO coefficient; optical intensity modulator; polyetherimide; side-chain structure; thermal stability enhancement; Electrooptic devices; Electrooptic modulators; Glass; Intensity modulation; Nonlinear optics; Optical modulation; Optical polymers; Optical signal processing; Temperature; Thermal stability;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.818925
