Evidence of space-charge effects in thermal poling

Author

Xu, W. ; Arentoft, J. ; Wong, D. ; Fleming, S.

Author_Institution

Opt. Fiber Technol. Centre, Sydney Univ., NSW, Australia

Volume

11

Issue

10

fYear

1999

Firstpage

1265

Lastpage

1267

Abstract

The in situ thermal poling processes in germanosilicate fibers for positive and negative poling voltages are significantly different. Thermal poling of silica fibers consists of two processes: the faster linear process of charge migration and the subsequent single exponential process of charge ionization. Both the shielding electrical field due to charge migration and the ionization electrical field due to charge ionization are able to be frozen-in at room temperature and lead to the residual linear electrooptic effects. The observations support that the mechanism of the induced electrooptic effects is based on space charge electrical fields instead of dipole/bond orientation.

Keywords

electro-optical devices; electro-optical effects; ionisation; optical fibre fabrication; space charge; thermo-optical effects; charge ionization; charge migration; frozen-i; germanosilicate fibers; in situ thermal poling processes; induced electrooptic effects; ionization electrical field; negative poling voltages; positive poling voltages; residual linear electrooptic effects; room temperature; shielding electrical field; single exponential process; space charge electrical fields; space-charge effects; thermal poling; Australia; Electrooptic effects; Ionization; Low earth orbit satellites; Optical fiber devices; Optical fibers; Silicon compounds; Space charge; Temperature; Voltage;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.789712

Filename

789712