FEMTOSECOND DEMODULATION AS A SOURCE FOR A THZ SPECTROMETER

Thumbnail Image

Files

1999-WF-02.jpg (94.56 KB)

Date

1999

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Ohio State University

Research Projects

Organizational Units

Journal Issue

Abstract

A Low Temperature Grown GaAs Photo Conductive Switch (LTG GaAs PCS) is employed to demodulate femtosecond pulses from an 800 MHz mode-locked Ti:sapphire laser. The resulting radiation contains the high spectral purity Fourier components of the original pulse train. The current ∼ THz bandwidth limitation is due to the 270 femtosecond carrier lifetime in the LTG GaAs. The spectral purity, sources of noise, and system dependence on laser repetition rate will be discussed. Doppler limited rotational spectra at frequencies of ∼1 THz will be presented.

Description

Author Institution: Department of Physics, The Ohio State University 174 West 18th Avenue; University of Massachusetts, Submillimeter Technology Lab; Physics Department, Duke University; Department of Physics, The Ohio State University

Keywords

Citation

URI

http://hdl.handle.net/1811/19542

Collections

Abstracts of OSU International Symposium on Molecular Spectroscopy 1990-1999