UQDT100-LN型光电探测器
(UQDT100-LN Photoelectric Detector) 产品介绍 (Products Introduction) UQDT100-LN型光电探测器是一种基于硅光电管的增益与工作带宽可调的量子探测器,它的基本原理是使其中的光电管吸收光子产生光电流并在其外电路中产生相应的光电压输出。该电探测器能够用来测量微弱的光强,通过标定,可以极其准确地测出光的强度,从1皮瓦/厘米2 到10毫瓦/厘米2。为了使用方便,该探测器的增益可以分12级调节,对于直流光强测量,最大增益为107V/W。对于交流光强测量,最大带宽为1MHz。UQDT100-LN型光电探测器采用直流偶合,光电探测器带有直流偏置电路,可以方便地消除光信号中的直流本地,提高信号增益的灵敏度。它们已被用作冷原子物理[1]、激光光谱[2]、光学频率标准[3]、光学位置精密测量、角度、表面均匀度、距离的精密测量等方面,另外在光学摄影、分析仪器、医学成像等方面也有重要应用。 仕様(Specifications):
Product Introduction
UQDT100-LN photoelectric detector is a device based on silicon photodiodes, of which the gain and bandwidth are adjustable. The photodiodes of the detector operate by absorption of photons and generate a flow of current in an external circuit, which converts the current into voltage for applications. The detector can be used to detect extremely weak change of the irradiated light, and can be calibrated for accurate measurements from intensities below 1pW/cm2 to intensities above 10mW/cm2. For convenient, the gain of detector is designed to be adjustable. The maximum gain for DC light signal is 107V/W while the maximum bandwidth for AC light signal is 1MHz. UQDT100-LN detector detects the light in DC coupling mode, the high sensitivity of gain is implemented by using a DC bias circuit to eliminate DC background of detected light signal. The detectors are utilized in such diverse applications as cold atom physics[1], laser spectroscopy[2], optical frequency standards[3], optical position sensors, beam alignment, laser range finders, and medical imaging instruments.
[1] Lin Xia, Xu Xu, Rui Guo, Fan Yang, Wei Xiong, Juntao Li, Qianli Ma, Xiaoji Zhou, Hong Guo, and Xuzong Chen, Phys. Rev. A 77, 043622 (2008) |