每個(ge)探(tan)測(ce)器還配有內部偏(pian)壓電(dian)池，封裝在(zai)堅固的鋁(lv)殼(ke)中。我(wo)們(men)的偏(pian)壓光(guang)電(dian)探(tan)測(ce)器兼(jian)容(rong)我(wo)們(men)的臺式光(guang)電(dian)二極管(guan)放(fang)大器和PMT跨阻(zu)放(fang)大器。

這些(xie)探測(ce)器具有寬(kuan)帶直(zhi)流(liu)耦合(he)輸(shu)出(chu)，非常適合(he)監測(ce)快速脈沖激光(guang)(guang)(guang)(guang)和直(zhi)流(liu)光(guang)(guang)(guang)(guang)源。側面的BNC接(jie)頭(tou)提供直(zhi)接(jie)的光(guang)(guang)(guang)(guang)電二極(ji)(ji)管陽(yang)極(ji)(ji)電流(liu)。通過一(yi)(yi)個(ge)終端(duan)電阻(zu)(zu)將(jiang)該輸(shu)出(chu)轉(zhuan)換為正電壓。如果查看高速信號，Thorlabs推薦使用(yong)50 Ω負載電阻(zu)(zu)。對(dui)于較低帶寬(kuan)應用(yong)，利用(yong)我(wo)們的可變終端(duan)或固定短樣(yang)式終端(duan)能(neng)(neng)夠快速調節測(ce)量電壓。下(xia)方探測(ce)器沒有放大器或內(nei)置增(zeng)益，因此工作速度(du)一(yi)(yi)般(ban)比(bi)我(wo)們的PDA系列放大光(guang)(guang)(guang)(guang)電探測(ce)器要快；對(dui)于需(xu)要增(zeng)益或可更(geng)(geng)換濾(lv)光(guang)(guang)(guang)(guang)片的應用(yong)，PDA放大光(guang)(guang)(guang)(guang)電探測(ce)器可能(neng)(neng)更(geng)(geng)為合(he)適。

所有(you)(you)的(de)連(lian)接端和控制按鈕都(dou)不(bu)在(zai)光路上，簡化了探測器(qi)在(zai)封閉空間內(nei)的(de)集成(cheng)。每個探測器(qi)具(ju)有(you)(you)SM05(0.535"-40)內(nei)螺紋和SM1(1.035"-40)外螺紋。每個DET外殼(ke)包含一個可(ke)拆卸的(de)Ø1英(ying)(ying)寸(cun)光學元件(jian)安(an)裝(zhuang)座(SM1T1)，用于沿(yan)光軸安(an)裝(zhuang)Ø1英(ying)(ying)寸(cun)元件(jian)，比如濾光片(pian)和透鏡。每個DET探測器(qi)也可(ke)安(an)裝(zhuang)在(zai)籠式系統(tong)、透鏡套(tao)管或Ø1/2英(ying)(ying)寸(cun)接桿(gan)上。每個探測器(qi)的(de)外殼(ke)都(dou)有(you)(you)兩個通用安(an)裝(zhuang)孔，兼容(rong)8-32和M4螺紋。

每(mei)個(ge)(ge)探測器都由(you)(you)裝(zhuang)在外(wai)(wai)殼(ke)中(zhong)的A23 12 VDC電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)提供(gong)反向(xiang)偏(pian)置電(dian)(dian)(dian)壓(ya)。外(wai)(wai)殼(ke)上還有(you)一(yi)個(ge)(ge)紅色(se)的按鈕(niu)，按住這個(ge)(ge)按鈕(niu)時，電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的電(dian)(dian)(dian)壓(ya)將(jiang)(jiang)(jiang)加到(dao)外(wai)(wai)部(bu)負載上。對于高Z負載，電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的電(dian)(dian)(dian)壓(ya)將(jiang)(jiang)(jiang)高于BNC，因此方便判(pan)斷是否需要更換電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)，而不必將(jiang)(jiang)(jiang)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)取(qu)出。如果(guo)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)連接到(dao)一(yi)個(ge)(ge)50 Ω的負載上測試，串聯的限流(liu)電(dian)(dian)(dian)阻可(ke)保(bao)護電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)不被快速放電(dian)(dian)(dian)。請注意，由(you)(you)于不同制造商(shang)生產的電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的正極(ji)(ji)端子之(zhi)間(jian)可(ke)能會(hui)存在細微差別(bie)，Thorlabs只(zhi)建議在我們的DET系列光電(dian)(dian)(dian)探測器中(zhong)使用(yong)Energizer電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)。由(you)(you)于電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)是一(yi)種(zhong)噪聲極(ji)(ji)低的電(dian)(dian)(dian)源(yuan)，所以將(jiang)(jiang)(jiang)它作為反向(xiang)偏(pian)壓(ya)電(dian)(dian)(dian)源(yuan)。如果(guo)不能接受電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的使用(yong)壽命有(you)限，則可(ke)以用(yong)DET2B電(dian)(dian)(dian)源(yuan)套件替換該電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)。

請注意，在探測(ce)器有源(yuan)區邊緣的不均勻性(xing)可能產生(sheng)有害(hai)的電(dian)容(rong)和電(dian)阻效應，從(cong)而扭曲光電(dian)二極(ji)管輸出的時域響應。因此(ci)，Thorlabs建(jian)議將(jiang)入射光正(zheng)對有源(yuan)區中心。外殼上的SM1(1.035"-40)螺紋非常適合(he)將(jiang)Ø1英寸聚(ju)焦透鏡或針孔安裝在探測(ce)元(yuan)件(jian)前面。

• 緊湊型外殼，用于狹窄空間的測量
• 兼容SM05透鏡套筒、SM1透鏡套筒、籠式系統和Ø1/2英寸接桿
• 包含內置A23 12 V偏壓電池
• 下方提供可選用的電源適配器和電源
• 可以通過SM1內螺紋和外螺紋光纖轉接件進行光纖耦合