Title

THz探测器

THz - Single Element - Detectors

	THz 10	THz 20	THz 30
孔径	10 mm	20 mm	30 mm
thermal time constant	50 ms	50 ms	50 ms
max. power density	15 mW/cm²	15 mW/cm²	15 mW/cm²
typ. current sensitivity	0.5 .. 1 µA/W	0.5 .. 1 µA/W	0.5 .. 1 µA/W
rise time*	100 µs	700 µs	2 ms
chopper rate	>500 Hz	200 Hz	80 Hz
* only the detector

This figure shows the sensitivity of the pyroelectric detectors normalized with
the sensitivity at 1 THz. Between 200 and 500 µm the sensitivity changes within 2 %.

THz - Trap - Detector

	Trap
孔径	20 mm
thermal time constant	50 ms
max. power	50 mW
typ. current sensitivity	0.5 .. 1 µA/W
rise time*	< 2 ms
chopper rate	8 - 50 Hz
* only the detector

Total reflectivity (loss) for a 3 element trap, left modelled
and right calculated from measured data for one detector.

最小可探测功率和最大的遮光频率取决于放大器和探测器的参数:

Bandwidth of the Amplifier	min. detectable power	max. chopper frequency
17 Hz	15 µW	10 Hz
40 Hz	25 µW	25 Hz
70 Hz	100 µW	50 Hz

Current-Preamplifier CPA（放大器）

结合探测器和前置放大器的灵敏度是由乘法当前探测器的灵敏度和电流放大器的放大(例如探测器10 ^{- 6} A / W和CPA 10⁹ V /A导致总灵敏度:10^-6A / W * 109 V / A = 1000 V/ W)。放大设置可以通过一个开关。

规格参数;

·电源:±15 V

·输入连接器:SMA或BNC

·输出连接器:BNC

·电源连接器:Lemo

放大器可以设置由四步开关:例如10⁷…10¹⁰ V /A;带宽是固定的*20Hz或200 Hz。检测极限取决于放大，带宽和探测器直径。