Terahertz radiation from optical rectification of a modulated laser pulse

Author

Gordon, D.F. ; Ting, A. ; Sprangle, P. ; Fischer, R. ; Kapetanakos, C.A. ; Zigler, A.

Author_Institution

Plasma Phys. Div., Naval Res. Lab., Washington, DC, USA

Volume

1

fYear

2005

fDate

19-23 Sept. 2005

Firstpage

245

Abstract

A terahertz source has been developed based on a hybrid of optical rectification and difference frequency generation. The optical pulse from a titanium:sapphire laser system is stretched and modulated using a spatial filtering technique to produce a several picosecond long pulse modulated at the terahertz frequency. A type II phase matched interaction is realized via angle tuning in a gallium selenide crystal. A liquid helium cooled silicon bolometer was used to establish a lower bound of 2 kW on the peak power observed at 1.1 THz. Tunability was demonstrated between 0.7 and 2.0 THz.

Keywords

bolometers; gallium compounds; optical modulation; optical pulse generation; rectification; sapphire; spatial filters; submillimetre wave generation; titanium; 0.7 to 2 THz; 2 kW; Ti-Al₂O₃; angle tuning; difference frequency generation; modulated laser pulse; optical pulse; optical rectification; silicon bolometer; spatial filtering; terahertz radiation; terahertz source; type II phase matched interaction; Filtering; Frequency; Hybrid power systems; Laser tuning; Nonlinear optics; Optical filters; Optical modulation; Optical pulses; Pulse modulation; Submillimeter wave filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on

Print_ISBN

0-7803-9348-1

Type

conf

DOI

10.1109/ICIMW.2005.1572500

Filename

1572500