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CBRN Defense Using THz Pulse Trains from Semiconductor Disk Lasers

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publicationNATO ARW on THz Diagnostics of CBRN effects and Detection of Explosives & CBRN
Subtitle of host publicationProceedings of the NATO ARW on Detection of Explosives and CBRN
Publication statusPublished - 2015
Publication typeA4 Article in a conference publication
EventNATO Advanced Research Workshop -
Duration: 1 Jan 1900 → …

Publication series

NameNATO Science for Peace and Security Series B: Physics and Biophysics
PublisherSpringer
ISSN (Electronic)1874-6500

Conference

ConferenceNATO Advanced Research Workshop
Period1/01/00 → …

Abstract

We propose THz generation from a photoconductive antenna illuminated by a train of optical pulses with a pulse repetition rate that corresponds to the desired THz frequency. This new method of THz generation can be seen as a hybrid between the conventional optical THz generation methods, where the optical source is either a heterodyne signal from two continuous wave lasers or a single short pulse. Therefore, the method holds promise for generating both coherent broadband and narrow-linewidth continuous wave THz radiation. The high-repetition rate optical pulse train is obtained from a semiconductor disk laser harmonically mode-locked by a semiconductor saturable absorber mirror and an intracavity etalon. Optical pulse trains with pulse repetition rates from 190 GHz to 580 GHz are demonstrated at an average optical output power of 1 W. This power level is enough for driving full arrays of photoconductive antennas. The approach may provide a compact and powerful THz source for CBRN defense.

Publication forum classification

Field of science, Statistics Finland