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Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser by sweeping the pulse repetition rate

Femtosecond lasers allow for simultaneous detection of multiple absorption lines of a specimen over a broad spectral range of infrared or visible light with a single spectroscopic measurement. Here, we present an 8-THz bandwidth, 0.5-GHz resolution scheme of Fourier-transform spectroscopy using an E...

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Autores principales: Lee, Keunwoo, Lee, Joohyung, Jang, Yoon-Soo, Han, Seongheum, Jang, Heesuk, Kim, Young-Jin, Kim, Seung-Woo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4621541/
https://www.ncbi.nlm.nih.gov/pubmed/26503257
http://dx.doi.org/10.1038/srep15726
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author Lee, Keunwoo
Lee, Joohyung
Jang, Yoon-Soo
Han, Seongheum
Jang, Heesuk
Kim, Young-Jin
Kim, Seung-Woo
author_facet Lee, Keunwoo
Lee, Joohyung
Jang, Yoon-Soo
Han, Seongheum
Jang, Heesuk
Kim, Young-Jin
Kim, Seung-Woo
author_sort Lee, Keunwoo
collection PubMed
description Femtosecond lasers allow for simultaneous detection of multiple absorption lines of a specimen over a broad spectral range of infrared or visible light with a single spectroscopic measurement. Here, we present an 8-THz bandwidth, 0.5-GHz resolution scheme of Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser. A resolving power of 1.6 × 10(4) about a 1560-nm center wavelength is achieved by sweeping the pulse repetition rate of the light source on a fiber Mach-Zehnder interferometer configured to capture interferograms with a 0.02-fs temporal sampling accuracy through a well-stabilized 60-m unbalance arm length. A dual-servo mechanism is realized by combining a mechanical linear stage with an electro-optic modulator (EOM) within the fiber laser cavity, enabling stable sweeping control of the pulse repetition rate over a 1.0-MHz scan range with 0.4-Hz steps with reference to the Rb clock. Experimental results demonstrate that the P-branch lines of the H(13)CN reference cell can be observed with a signal-to-noise ratio reaching 350 for the most intense line.
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spelling pubmed-46215412015-10-29 Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser by sweeping the pulse repetition rate Lee, Keunwoo Lee, Joohyung Jang, Yoon-Soo Han, Seongheum Jang, Heesuk Kim, Young-Jin Kim, Seung-Woo Sci Rep Article Femtosecond lasers allow for simultaneous detection of multiple absorption lines of a specimen over a broad spectral range of infrared or visible light with a single spectroscopic measurement. Here, we present an 8-THz bandwidth, 0.5-GHz resolution scheme of Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser. A resolving power of 1.6 × 10(4) about a 1560-nm center wavelength is achieved by sweeping the pulse repetition rate of the light source on a fiber Mach-Zehnder interferometer configured to capture interferograms with a 0.02-fs temporal sampling accuracy through a well-stabilized 60-m unbalance arm length. A dual-servo mechanism is realized by combining a mechanical linear stage with an electro-optic modulator (EOM) within the fiber laser cavity, enabling stable sweeping control of the pulse repetition rate over a 1.0-MHz scan range with 0.4-Hz steps with reference to the Rb clock. Experimental results demonstrate that the P-branch lines of the H(13)CN reference cell can be observed with a signal-to-noise ratio reaching 350 for the most intense line. Nature Publishing Group 2015-10-27 /pmc/articles/PMC4621541/ /pubmed/26503257 http://dx.doi.org/10.1038/srep15726 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Lee, Keunwoo
Lee, Joohyung
Jang, Yoon-Soo
Han, Seongheum
Jang, Heesuk
Kim, Young-Jin
Kim, Seung-Woo
Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser by sweeping the pulse repetition rate
title Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser by sweeping the pulse repetition rate
title_full Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser by sweeping the pulse repetition rate
title_fullStr Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser by sweeping the pulse repetition rate
title_full_unstemmed Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser by sweeping the pulse repetition rate
title_short Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser by sweeping the pulse repetition rate
title_sort fourier-transform spectroscopy using an er-doped fiber femtosecond laser by sweeping the pulse repetition rate
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4621541/
https://www.ncbi.nlm.nih.gov/pubmed/26503257
http://dx.doi.org/10.1038/srep15726
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