Design of Efficient Tunable Terahertz-Wave Parametric Oscillator

The terahertz(THz)region of the electromag-netic spectrum covers the frequency range from0·1THz to10·0THz(the wavelengthisinthe range30-3000μm),which is between the microwavesandinfrared regi mes.Recently,this range has beenextended to40-50THz.Sources in this region havefound many applications,such as THz spectroscopyfor studies of carrier dynamics andinter molecular dy-namicsin liquids[1].THz sources in this region havefound many applications,suchasin material sciences,solid state phys…     

Fizeau Interferometery for THz-Waves＇ Frequency and Intensity Measurement

A terahertz-wave generator based on optical parametric oscillator principle, detection based on combination of Fizeau wedged interferometer and an electro-optical crystal ZnTe has been studied. The analytical solution based on the basic principle of operation of solid wedge Fizeau interferometer has been realized. The mathematical calculations for THz frequency and intensity measurement dependent on wedge angle and fringe spacing have been considered. The efficiency of THz wave detection depends upon optimized wedge angle has been also realized. The feasibility of detection of THz waves＇ frequency and intensity by solid Fizeau interferometer （THz-waves＇ range of 1 - 3 THz） has been studied. By optimization of other parameters like thickness of Fizeau film, refractive index, material of Fizeau film, we can proceed towards the design of Fizeau interferometer for required research plans as it is a simple and inexpensive interferometer.     

Fizeau Interferometery for THz-Waves' Frequency and Intensity Measurement

A terahertz-wave generator based on optical parametric oscillator principle,detection based on combination of Fizeau wedged interferometer and an electro-optical crystal ZnTe has been studied.The analytical solution based on the basic principle of operation of solid wedge Fizeau interferometer has been realized.The mathematical calculations for THz frequency and intensity measurement dependent on wedge angle and fringe spacing have been considered.The efficiency of THz wave detection depends upon optimized wedge angle has been also realized.The feasibility of detection of THz waves' frequency and intensity by solid Fizeau interferometer(THz-waves' range of 1-3 THz)has been studied.By optimization of other parameters like thickness of Fizeau film,refractive index,material of Fizeau film,we can proceed towards the design of Fizeau interferometer for required research plans as it is a simple and inexpensive interferometer.     

用参量法通过LiNbO3晶体产生太赫兹的理论设计

按照参量振荡器的基本原理,从理论上设计了一个太赫兹参量振荡器。根据动量守恒、能量守恒条件以及相位匹配条件,应用铌酸锂(LiNbO3)晶体,给出了理论设计过程。画出了频率在太赫兹波段,波长与折射率的关系曲线,分析了太赫兹参量振荡器的非共线相位匹配条件,确定了晶体形状及其切割角、输出太赫兹波的可调谐范围,并画出了晶体为铌酸锂时相应的曲线,根据有效的输出功率,最后设计出最佳的太参量振荡器的结构。     

用于测量太赫兹的菲索波长计

给出了菲索干涉仪的工作原理,研究了用于测量脉冲太赫兹源的菲索波长计的特性.理论上计算了菲索干涉仪的楔角和干涉条纹间距与被测太赫兹波长的关系,给出了关系曲线.优化了用于太赫兹探测时菲索干涉仪的楔角值.