Observation of acetylene saturated absorption in hollow-core photonic crystal fiber by using optical heterodyne detection
碩士 === 逢甲大學 === 光電研究所 === 100 === The hollow-core photonic crystal fiber can increase the overlapping between light and gas effectively, and make high optical power density easier. In this thesis, it is used as an absorption cell to observe saturated absorption on P(9) line of acetylene with the hel...
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ndltd-TW-100FCU051240162015-10-13T21:27:33Z http://ndltd.ncl.edu.tw/handle/92014937498046103790 Observation of acetylene saturated absorption in hollow-core photonic crystal fiber by using optical heterodyne detection 以光學外差法觀測空心光子晶體光纖中乙炔飽和吸收 Jia-lun Chang 張家綸 碩士 逢甲大學 光電研究所 100 The hollow-core photonic crystal fiber can increase the overlapping between light and gas effectively, and make high optical power density easier. In this thesis, it is used as an absorption cell to observe saturated absorption on P(9) line of acetylene with the help of optical heterodyne detection. Laser beam, which passes absorption cell first time, is used as the pump beam. After double passing an acousto-optic modulator (AOM) and reflection back into absorption cell, the laser beam is used as the probe beam. The probe beam interferes with the beam reflected by splice between single mode fiber and hollow-core photonic crystal fiber. An optical heterodyne signal can be generated from a photodetector receiving both light beams. We use the self-homodyne technique to obtain the signal amplitude from the optical heterodyne signal, and retrieved the saturated absorption spectrum. Relative to original absorption center, the center of our saturated absorption signal has a frequency shift by one AOM’s driving frequency. While the conventional scheme of saturation absorption using AOM will have a miss alignment, our saturated dip center is aligned with the Doppler background center. Che-Chung Chou 周哲仲 2012 學位論文 ; thesis 55 zh-TW |
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碩士 === 逢甲大學 === 光電研究所 === 100 === The hollow-core photonic crystal fiber can increase the overlapping between light and gas effectively, and make high optical power density easier. In this thesis, it is used as an absorption cell to observe saturated absorption on P(9) line of acetylene with the help of optical heterodyne detection. Laser beam, which passes absorption cell first time, is used as the pump beam. After double passing an acousto-optic modulator (AOM) and reflection back into absorption cell, the laser beam is used as the probe beam. The probe beam interferes with the beam reflected by splice between single mode fiber and hollow-core photonic crystal fiber. An optical heterodyne signal can be generated from a photodetector receiving both light beams. We use the self-homodyne technique to obtain the signal amplitude from the optical heterodyne signal, and retrieved the saturated absorption spectrum. Relative to original absorption center, the center of our saturated absorption signal has a frequency shift by one AOM’s driving frequency. While the conventional scheme of saturation absorption using AOM will have a miss alignment, our saturated dip center is aligned with the Doppler background center.
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author2 |
Che-Chung Chou |
author_facet |
Che-Chung Chou Jia-lun Chang 張家綸 |
author |
Jia-lun Chang 張家綸 |
spellingShingle |
Jia-lun Chang 張家綸 Observation of acetylene saturated absorption in hollow-core photonic crystal fiber by using optical heterodyne detection |
author_sort |
Jia-lun Chang |
title |
Observation of acetylene saturated absorption in hollow-core photonic crystal fiber by using optical heterodyne detection |
title_short |
Observation of acetylene saturated absorption in hollow-core photonic crystal fiber by using optical heterodyne detection |
title_full |
Observation of acetylene saturated absorption in hollow-core photonic crystal fiber by using optical heterodyne detection |
title_fullStr |
Observation of acetylene saturated absorption in hollow-core photonic crystal fiber by using optical heterodyne detection |
title_full_unstemmed |
Observation of acetylene saturated absorption in hollow-core photonic crystal fiber by using optical heterodyne detection |
title_sort |
observation of acetylene saturated absorption in hollow-core photonic crystal fiber by using optical heterodyne detection |
publishDate |
2012 |
url |
http://ndltd.ncl.edu.tw/handle/92014937498046103790 |
work_keys_str_mv |
AT jialunchang observationofacetylenesaturatedabsorptioninhollowcorephotoniccrystalfiberbyusingopticalheterodynedetection AT zhāngjiālún observationofacetylenesaturatedabsorptioninhollowcorephotoniccrystalfiberbyusingopticalheterodynedetection AT jialunchang yǐguāngxuéwàichàfǎguāncèkōngxīnguāngzijīngtǐguāngxiānzhōngyǐguìbǎohéxīshōu AT zhāngjiālún yǐguāngxuéwàichàfǎguāncèkōngxīnguāngzijīngtǐguāngxiānzhōngyǐguìbǎohéxīshōu |
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