Continuous-wave terahertz light from optical parametric oscillators.pdf

Continuous-wave terahertz light from optical parametric oscillators PDF

Rosita Sowade

Continuous-wave (cw) optical parametric oscillators (OPOs) are working horses for spectroscopy for near and mid infrared wavelengths. However, in the terahertz frequency range (0.1 to 10 THz), the pump threshold for oscillation is larger than 100 W due to high absorptions 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 thethreshold, the signal wave of a primary infrared process is resonantly enhanced to serve as a pump wave for a cascaded parametric process with one wave being at the terahertz frequency level. Such a device inhibits high potential for applications in areas like astronomy, telecommunications or high-resolution spectroscopy.

ULB Bonn ::: Dissertation - Rosita Sowade: … 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.

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Continuous-wave terahertz light from optical parametric oscillators.pdf

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23 Nov 2009 ... ... at 1.35 THz is confirmed by analyzing the terahertz light with metal grid polarizers ... Pump-enhanced optical parametric oscillator generating continuous wave ... Rapidly tunable continuous-wave optical parametric oscillator ... 17 Sep 2019 ... A pump rejecter mirror separates the pump light from the idler and signal beams ... (UV) to ~12 μm in the mid-infrared (mid-IR), as well as the terahertz ... growth of the parametric waves in one round-trip of the optical cavity just ...

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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.

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23 Nov 2009 ... ... at 1.35 THz is confirmed by analyzing the terahertz light with metal grid polarizers ... Pump-enhanced optical parametric oscillator generating continuous wave ... Rapidly tunable continuous-wave optical parametric oscillator ... 17 Sep 2019 ... A pump rejecter mirror separates the pump light from the idler and signal beams ... (UV) to ~12 μm in the mid-infrared (mid-IR), as well as the terahertz ... growth of the parametric waves in one round-trip of the optical cavity just ...