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1.发明公开TERAHERTZ TRANSCEIVERS AND METHODS FOR EMISSION AND DETECTION OF TERAHERTZ PULSES USING SUCH TRANSCEIVERS 有权太赫兹收发器和发射这些应用的方法和太赫兹脉冲检测
公开(公告)号：EP1281061A1
公开(公告)日：2003-02-05
申请号：EP01924676.8
申请日：2001-04-05
发明人： ZHANG, X.-C. , TANI, Masahiko , JIANG, Zhiping , CHEN, Qin
CPC分类号： G01N21/3581 , G01J11/00
摘要： A system for emitting and detecting terahertz frequency electromagnetic pulses. The system comprises a single transceiver device, which may be an electro-optic crystal or photoconductive antenna, for both emitting and detecting the pulses. A related method comprises using a single transceiver device to both emit and detect electromagnetic terahertz frequency pulses. The transceiver device is excited by a pump pulse to emit a terahertz output pulse, which is modulated with a chopper. An object reflects the terahertz pulse and the reflected pulse is detected in the transceiver using a probe pulse. A lock-in amplifier set to the same frequency of the chopper is used to reduce noise in the signal detected by the transceiver. An image of the object may be created using the intensity or the timing of the peak amplitude of the terahertz pulses reflected from the object.
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2.发明授权TERAHERTZ TRANSCEIVERS AND METHODS FOR EMISSION AND DETECTION OF TERAHERTZ PULSES USING SUCH TRANSCEIVERS 有权太赫兹收发器和发射这些应用的方法和太赫兹脉冲检测
公开(公告)号：EP1281061B1
公开(公告)日：2006-03-29
申请号：EP01924676.8
申请日：2001-04-05
发明人： ZHANG, X.-C. , TANI, Masahiko , JIANG, Zhiping , CHEN, Qin
CPC分类号： G01N21/3581 , G01J11/00
摘要： A system for emitting and detecting terahertz frequency electromagnetic pulses. The system comprises a single transceiver device, which may be an electro-optic crystal or photoconductive antenna, for both emitting and detecting the pulses. A related method comprises using a single transceiver device to both emit and detect electromagnetic terahertz frequency pulses. The transceiver device is excited by a pump pulse to emit a terahertz output pulse, which is modulated with a chopper. An object reflects the terahertz pulse and the reflected pulse is detected in the transceiver using a probe pulse. A lock-in amplifier set to the same frequency of the chopper is used to reduce noise in the signal detected by the transceiver. An image of the object may be created using the intensity or the timing of the peak amplitude of the terahertz pulses reflected from the object.
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