Continuous-wave terahertz light from optical parametric oscillators
Continuous-wave terahertz light from optical parametric oscillators
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DissertationPrüfungsdatum
19.11.2010Datum der Veröffentlichung
01.12.2010Erstgutachter
Buse, KarstenZweitgutachter
Schlemmer, StephanMetadaten
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Inhalt
Continuous-wave (cw) optical parametric oscillators (OPOs) are working horses for spectroscopy in the near and mid infrared. However, in the terahertz frequency range (0.1 to 10 THz), the pump threshold is more than 100 W due to the high absorption in nonlinear crystals and thus exceeds the power of standard cw single-frequency pump sources.
In this thesis the first cw OPO capable of generating terahertz radiation is demonstrated. To overcome the high threshold, the signal wave of a primary infrared process is resonantly enhanced to serve as the pump wave for a cascaded parametric process with one wave being at the terahertz frequency level. A terahertz output power of more than two microwatts is measured and tuning is achieved from 1.3 to 1.7 THz. This terahertz source emits a narrow-band, diffraction-limited beam which remains mode-hop free over more than one hour.
Such a device inhibits high potential for applications in areas like astronomy, telecommunications or high-resolution spectroscopy.
In this thesis the first cw OPO capable of generating terahertz radiation is demonstrated. To overcome the high threshold, the signal wave of a primary infrared process is resonantly enhanced to serve as the pump wave for a cascaded parametric process with one wave being at the terahertz frequency level. A terahertz output power of more than two microwatts is measured and tuning is achieved from 1.3 to 1.7 THz. This terahertz source emits a narrow-band, diffraction-limited beam which remains mode-hop free over more than one hour.
Such a device inhibits high potential for applications in areas like astronomy, telecommunications or high-resolution spectroscopy.
Schlagwörter
Terahertz-Erzeugung, nichtlineare Optik, parametrische Oszillatoren, OPO, Terahertz generation, nonlinear optics, parametric processes, optical parametric oscillators
Klassifikation (DDC)
530 PhysikSowade, Rosita: Continuous-wave terahertz light from optical parametric oscillators. - Bonn, 2010. - Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn.
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5N-23613
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5N-23613
@phdthesis{handle:20.500.11811/4688,
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5N-23613,
author = {{Rosita Sowade}},
title = {Continuous-wave terahertz light from optical parametric oscillators},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2010,
month = dec,
note = {Continuous-wave (cw) optical parametric oscillators (OPOs) are working horses for spectroscopy in the near and mid infrared. However, in the terahertz frequency range (0.1 to 10 THz), the pump threshold is more than 100 W due to the high absorption in nonlinear crystals and thus exceeds the power of standard cw single-frequency pump sources.
In this thesis the first cw OPO capable of generating terahertz radiation is demonstrated. To overcome the high threshold, the signal wave of a primary infrared process is resonantly enhanced to serve as the pump wave for a cascaded parametric process with one wave being at the terahertz frequency level. A terahertz output power of more than two microwatts is measured and tuning is achieved from 1.3 to 1.7 THz. This terahertz source emits a narrow-band, diffraction-limited beam which remains mode-hop free over more than one hour.
Such a device inhibits high potential for applications in areas like astronomy, telecommunications or high-resolution spectroscopy.},
url = {https://hdl.handle.net/20.500.11811/4688}
}
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5N-23613,
author = {{Rosita Sowade}},
title = {Continuous-wave terahertz light from optical parametric oscillators},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2010,
month = dec,
note = {Continuous-wave (cw) optical parametric oscillators (OPOs) are working horses for spectroscopy in the near and mid infrared. However, in the terahertz frequency range (0.1 to 10 THz), the pump threshold is more than 100 W due to the high absorption in nonlinear crystals and thus exceeds the power of standard cw single-frequency pump sources.
In this thesis the first cw OPO capable of generating terahertz radiation is demonstrated. To overcome the high threshold, the signal wave of a primary infrared process is resonantly enhanced to serve as the pump wave for a cascaded parametric process with one wave being at the terahertz frequency level. A terahertz output power of more than two microwatts is measured and tuning is achieved from 1.3 to 1.7 THz. This terahertz source emits a narrow-band, diffraction-limited beam which remains mode-hop free over more than one hour.
Such a device inhibits high potential for applications in areas like astronomy, telecommunications or high-resolution spectroscopy.},
url = {https://hdl.handle.net/20.500.11811/4688}
}
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