Title :
In-line phase compensator for intense thz generation in selected gases
Author :
Dai, Jianming ; Tongue, Thomas ; Zhang, X.-C.
Author_Institution :
Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
A device for phase and polarization control of omega (800 nm) and its second harmonic 2 omega (400 nm) beams is presented for intense THz generation from laser-induced gas plasma in gas cells. Long-term stability is achieved using an in-line design with a quartz wedge pair and alpha-BBO birefringent plates for phase control and a dual wavelength waveplate to align the polarization of omega and 2 omega. This phase compensator, in an in-line configuration, is expected to be used to generate intense THz waves at standoff distances with high dynamic range.
Keywords :
birefringence; optical harmonic generation; terahertz wave generation; alpha-BBO birefringent plates; gas cells; in-line phase compensator; intense terahertz generation; laser induced gas plasma; long-term stability; phase control; polarization control; quartz wedge pair; second harmonic; wavelength 400 nm; Gas lasers; Gases; Laser beams; Optical control; Optical harmonic generation; Particle beams; Plasma devices; Plasma stability; Plasma waves; Polarization;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5416-7
Electronic_ISBN :
978-1-4244-5417-4
DOI :
10.1109/ICIMW.2009.5324701
