公开(公告)号：US08749225B2

公开(公告)日：2014-06-10

申请号：US13641777

申请日：2011-08-29

申请人： Zhiyong Tan ,  Juncheng Cao ,  Yingjun Han ,  Zhen Chen

发明人： Zhiyong Tan ,  Juncheng Cao ,  Yingjun Han ,  Zhen Chen

IPC分类号： G01R13/38

CPC分类号： G01J1/4257 ,  B82Y20/00 ,  H01S3/0014 ,  H01S5/0014 ,  H01S5/3402

摘要： The present invention provides a power measurement apparatus and method for a pulsed terahertz quantum-cascade laser (THz QCL). The apparatus includes a light source part, a light path part, and a detection part. Terahertz light emitted by a THz QCL reaches a terahertz quantum-well photodetector (THz QWP) through the measurement apparatus, and is absorbed to generate a corresponding current signal. A signal processing circuit extracts a voltage signal from the current signal, amplifies the voltage signal, and inputs the amplified voltage signal to an oscilloscope for reading and displaying. According to a responsivity of the THz QWP at a lasing frequency of the laser, the measurement of the output power of the pulsed THz QCL is acquired. The present invention avoids integration estimation when a thermal detector is used to measure output power of a THz QCL in a pulse operating mode, and can directly acquire the power value of a pulsed output from the laser according to the amplitude of the detector responding to the pulsed terahertz light.

摘要翻译： 本发明提供了一种用于脉冲太赫兹量子级联激光器（THz QCL）的功率测量装置和方法。 该装置包括光源部分，光路部分和检测部分。 由太赫兹QCL发射的太赫兹光通过测量装置到达太赫兹量子阱光电检测器（THz QWP），并被吸收以产生相应的电流信号。 信号处理电路从电流信号中提取电压信号，放大电压信号，并将放大的电压信号输入到示波器进行读取和显示。 根据激光器的激光频率下的THz QWP的响应度，获得脉冲THz QCL的输出功率的测量。 本发明在热探测器用于测量脉冲操作模式中的THz QCL的输出功率时避免了积分估计，并且可以根据检测器的振幅直接从激光器获取脉冲输出的功率值 脉冲太赫兹光。

公开(公告)号：US20140103904A1

公开(公告)日：2014-04-17

申请号：US13641777

申请日：2011-08-29

申请人： Zhiyong Tan ,  Juncheng Cao ,  Yingjun Han ,  Zhen Chen

发明人： Zhiyong Tan ,  Juncheng Cao ,  Yingjun Han ,  Zhen Chen

IPC分类号： G01J1/42

CPC分类号： G01J1/4257 ,  B82Y20/00 ,  H01S3/0014 ,  H01S5/0014 ,  H01S5/3402

摘要： The present invention provides a power measurement apparatus and method for a pulsed terahertz quantum-cascade laser (THz QCL). The apparatus includes a light source part, a light path part, and a detection part. Terahertz light emitted by a THz QCL reaches a terahertz quantum-well photodetector (THz QWP) through the measurement apparatus, and is absorbed to generate a corresponding current signal. A signal processing circuit extracts a voltage signal from the current signal, amplifies the voltage signal, and inputs the amplified voltage signal to an oscilloscope for reading and displaying. According to a responsivity of the THz QWP at a lasing frequency of the laser, the measurement of the output power of the pulsed THz QCL is acquired. The present invention avoids integration estimation when a thermal detector is used to measure output power of a THz QCL in a pulse operating mode, and can directly acquire the power value of a pulsed output from the laser according to the amplitude of the detector responding to the pulsed terahertz light.

摘要翻译： 本发明提供了一种用于脉冲太赫兹量子级联激光器（THz QCL）的功率测量装置和方法。 该装置包括光源部分，光路部分和检测部分。 由太赫兹QCL发射的太赫兹光通过测量装置到达太赫兹量子阱光电检测器（THz QWP），并被吸收以产生相应的电流信号。 信号处理电路从电流信号中提取电压信号，放大电压信号，并将放大的电压信号输入到示波器进行读取和显示。 根据激光器的激光频率下的THz QWP的响应度，获得脉冲THz QCL的输出功率的测量。 本发明在热探测器用于测量脉冲操作模式中的THz QCL的输出功率时避免了积分估计，并且可以根据检测器的振幅直接从激光器获取脉冲输出的功率值 脉冲太赫兹光。