摘要
为了获得材料在太赫兹波段的信息,设计了一种频率在1 THz～15 THz范围的便携式波谱仪。该仪器以可调谐的THz量子级联激光器为光源,实现1 THz～15 THz的连续"白光"发射,以高灵敏度的超晶格结构半导体为探测器,利用电子学系统、计算机控制和数据处理得出材料在该波段的光谱信息,进而得出材料的结构信息。由于太赫兹量子级联激光器具有发热少,衰减弱,信噪比高,范围宽等优点,以此为光源的波谱仪小巧紧凑,便于移动和携带,具有传统波谱仪无法实现的优点。
In order to obtain material information in the terahertz band,a portable spectrometer in 1 THz-15 THz was designed in this study.THz quantum cascade laser with wavelength tunable was used as light source,which can emit continuous＂white＂light in 1 THz-15 THz,and semiconductor of superlattice structure was used as high sensitivity detector in the instrument.The electronics,computer control and data processing system were used to derive the spectral information of the materials,which would reflect the structural information.The terahertz quantum cascade laser bears the advantages of less heat output,less attenuation,high ratio of signal to noise,and wide range.The spectrometer is compact and easy to be moved when it adopts the terahertz quantum cascade laser as a light source.It exceeds conventional spectrometer in many applications.
出处
《信息与电子工程》
2011年第3期280-282,共3页
information and electronic engineering
关键词
太赫兹波谱仪
便携式
分子振动光谱
量子级联激光器
THz wave spectrometer
portable
spectrum of molecular motion
quantum cascade lasers
