High-Speed High-Resolution Terahertz Spectrometers

Yee, Dae-Su, Kim, Youngchan, Yi, Minwoo and Ahn, Jaewook (2010) High-Speed High-Resolution Terahertz Spectrometers Journal of the Korean Physical Society, 56 (1(1)). pp. 255-261.

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Abstract

We demonstrate and characterize both asynchronous optical sampling terahertz time-domain spectroscopy (AOS THz-TDS) and terahertz frequency comb spectroscopy (TFCS) as high-speed, high-resolution terahertz (THz) spectroscopy. Two mode-locked femtosecond (fs) lasers with slightly different repetition frequencies are used without a mechanical delay stage to generate and detect THz pulses, respectively. Repetition frequencies of the two fs lasers are stabilized by use of two phase-locked loops sharing the same reference oscillator, respectively. For AOS THz-TDS, the difference frequency between the repetition frequencies is optimized and a signal-to-noise ratio is measured as a function of a measurement time. Spectra of THz frequency comb and its individual modes are measured from TFCS. A spectral resolution of 100 MHz is obtained in the both types of spectroscopy.

Item Type:	Article
Divisions :	Faculty of Health and Medical Sciences > School of Biosciences and Medicine
Authors :	Name Email ORCID Yee, Dae-Su Kim, Youngchan youngchan.kim@surrey.ac.uk Yi, Minwoo Ahn, Jaewook
Date :	15 January 2010
DOI :	10.3938/jkps.56.255
Copyright Disclaimer :	Copyright © 2016 The Korean Physical Society. All Rights Reserved.
Depositing User :	James Marshall
Date Deposited :	30 Jun 2020 08:55
Last Modified :	30 Jun 2020 08:55
URI:	http://epubs.surrey.ac.uk/id/eprint/858099

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