These types of pyroelectric detectors are optimized for application in THz region. The detectors are small, have a large active area and a short response time.
The basic principle is the absorption of radiation pulses from a pulsed or per chopper modulated cw radiation source on the absorbing layer. In combination with a low-noise current amplifier it is possible to detect the power of the radiation source.
The thin pyroelectrical material makes it heating stronger and faster, which leads to a higher sensitivity. It´s also possible to use these sensors at high repetition frequencies. These advantages are bound to the disadvantage of a higher microphony.
At very short pulses it is possible to use this detector in combination with a voltage amplifier (f.e. VPA) as an energy detector for µJ and mJ region.
The basic principle is the absorption of radiation pulses from a pulsed or per chopper modulated cw radiation source on the absorbing layer. In combination with a low-noise current amplifier it is possible to detect the power of the radiation source.
The thin pyroelectrical material makes it heating stronger and faster, which leads to a higher sensitivity. It´s also possible to use these sensors at high repetition frequencies. These advantages are bound to the disadvantage of a higher microphony.
At very short pulses it is possible to use this detector in combination with a voltage amplifier (f.e. VPA) as an energy detector for µJ and mJ region.
