Title :
Novel method to measure the refractive index and the absorption coefficient of organic nonlinear crystals in the ultra wideband THz region
Author :
Ohno, Seigo ; Miyamoto, Katsuhiko ; Minamide, Hiroaki ; Ito, Hiromasa
Author_Institution :
RIKEN Sendai, Sendai, Japan
Abstract :
A method for simultaneously measuring the refractive index and absorption coefficient of nonlinear optical crystals in the ultra-wideband terahertz (THz) region was developed. This method is based on the analysis of a collinear difference frequency generation (DFG) process using a tunable, dual-wavelength, optical parametric oscillator. The refractive index and the absorption coefficient in the organic nonlinear crystal DAS were experimentally determined in the frequency range of 2.5-26.2 THz.
Keywords :
absorption coefficients; optical frequency conversion; optical materials; optical parametric oscillators; optical tuning; organic compounds; refractive index measurement; terahertz wave generation; absorption coefficient; collinear difference frequency generation; frequency 2.5 THz to 26.2 THz; organic nonlinear optical crystals; refractive index measurement; tunable dual-wavelength optical parametric oscillator; ultra wideband THz region; ultra-wideband terahertz region; Absorption; Crystals; Frequency; Nonlinear optics; Optical refraction; Optical variables control; Oscillators; Refractive index; Submillimeter wave measurements; Ultra wideband technology;
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.2009.5325565
