Generation of continuous-wave terahertz radiation using a two-mode titanium sapphire laser containing an intracavity Fabry–Perot etalon
Generation of continuous-wave terahertz radiation using a two-mode titanium sapphire laser containing an intracavity Fabry–Perot etalon
复制标题
使用包含腔内法布里-珀罗标准具的双模钛蓝宝石激光器产生连续波太赫兹辐射
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Mikulics
中科院分区：
文献类型：
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作者：
M. R. Stone;M. Naftaly;R. Miles;I. C. Mayorga;A. Malcoci;M. Mikulics
利用钛蓝宝石激光器的双模式光混频产生连续太赫兹辐射。通过在激光谐振腔中放置法布里-珀罗标准具，使激光器在两个模式上振荡。通过调节标准具的自由光谱范围（FSR），可以改变太赫兹辐射的频率，使其等于两个模式的差频。通过在低温生长的GaAs上制作的对数螺旋天线进行光混合;并对发射的太赫兹辐射进行了表征。用Golay池测得0.3THz和0.5THz的THz功率分别为1μW和0.7μW。由傅里叶变换干涉仪确定的太赫兹频率被认为对应于标准具FSR。还测定了光混合器的电流-电压特性，并通过激光束的自相关性观察到光电流调制。
Continuous-wave terahertz (THz) radiation was generated by photomixing two modes of a titanium sapphire laser. The laser was induced to oscillate on two modes by placing a Fabry–Perot etalon in the laser resonator. The frequency of terahertz radiation, which was equal to the difference frequency of the two modes, was varied by adjusting the free spectral range (FSR) of the etalon. Photomixing was performed by logarithmic spiral antennas fabricated on low-temperature-grown GaAs; and the emitted THz radiation was characterized. The THz power, measured by a Golay cell, was 1μW at 0.3THz and 0.7μW at 0.5THz. The THz frequency, as determined by a Fourier transform interferometer, was seen to correspond to the etalon FSR. The current-voltage characteristics of photomixers were also determined, and photocurrent modulation was observed by the autocorrelation of the laser beam.