Photovoltaic Mercury Cadmium Telluride Detectors

Transcription

1 Photovoltaic Mecuy Cadiu Tellui s Teledyne Judson Technologies LLC Coece Dive Montgoeyville, PA 89 USA Tel: -8-9 Fax: --7 Visit us on the web. ISO 9 Cetified /

2 J9 PV MCT Opeating Notes (. to µ) Geneal Figue Photodio Equivalent Cicuit R bias (~K ) Iph IS RS V bias -.V VD CD.E+.E+ -9C D* (Jones) J9 seies tectos ae high-quality HgCdTe (MCT) photodios fo use in the n to µ spectal ange. The equivalent cicuit is a photon-geneated cuent souce Iph with paallel capacitance CD, shunt esistance RD, and seies esistance RS. (Figue ) Figue ical D* vs Wavelength fo oo tepeatue and TE-, PV MCT, µ cutoff,, 8 FOV; FOV at -9C RD -8C.E+ C -C -C.E+ C L O A D.E Wavelength (u) Iph = Cuent geneated by incint photons VD = Actual voltage acoss dio junction CD = junction capacitance RD = shunt esistance Rs = seies esistance Is = Output signal cuent Responsivity Cooling an MCT photodio inceases its shunt esistance which esults in educed noise and ipoved tectivity. Figues and show the elationship between tecto tepeatue and tectivity (D*) as a function of wavelength. The D* plots in Figue ae fo a tecto with an active size of, % cutoff wavelength at µ and opeating fo -C to -9C. The tectos ae ounted on theoelectic cooles (TEC) whee one-stage (TE) is used fo -C opeation and subsequent stages (TE, TE and TE) ae used to achieve lowe tepeatues. Siilaly, Figue shows a seies of plots fo D* vs. wavelength fo a tecto with an active size of, % cutoff wavelength at µ and opeating fo oo tepeatue (+C) to -9C. The field of view (FOV) is 8 except at -9C whee the FOV is. Figue ical Spectal Response, PV MCT, µ cutoff,, TE-, 8 FOV..7. Responsivity (A/W) Tepeatue Effects Figues and show a typical spectal esponse fo size, µ and µ cutoff, espectively. Please efe to Tables, and fo futhe tecto specifications fo µ, µ and µ wavelength cutoffs, espectively Wavelength (µ) Figue ical D* vs Wavelength fo TE-, PV MCT, µ cutoff,, 8 FOV, -9C Figue ical Spectal Response, PV MCT, µ cutoff,, 8 FOV.E+.. Responsivity (A/W) D* (Jones) -9C -8C.E+ C.9. -C. -C.E+9 Wavelength (µ)..... Wavelength (u) /

3 Theoelectic Coole Opeation Teledyne Judson offes a vaiety of convenient packages fo oo tepeatue and theoelectically (TE) cooled opeation. ical powe equieents fo the TE, TE and TE cooles ae shown in Figues 8, 9 and on page. The built in theisto can be used to onito o contol the tepeatue. Figue shows typical theisto esistance vs. tepeatue values. Sensitivity and cutoff wavelength ae functions of tepeatue. tepeatue should be optiized fo a paticula application. Figue ical Theisto Cuve Theisto Resistance (K ) Advantages of Photovoltaic MCT Unlike the MCT photoconductos coonly used in the 7n to µ egion, MCT photodios opeate in the photovoltaic o and can opeate at zeo bias. J9 tectos ae a bette choice fo DC and low-fequency applications as they exhibit low /F noise chaacteistics as copaed to PbS, PbSe and HgCdTe photoconductos. J9 tectos also offe supeio pulse esponse fo applications in onitoing and tecting high-speed pulsed lases. They do not equie a choppe and exhibit bette lineaity than photoconductive tectos. Accessoies A theoelectically cooled tecto equies a heat sink to dissipate the heat geneated by the coole, an aplifie to aplify the tecto signal to a usable level and a tepeatue contolle to hold the tecto at a constant tepeatue. Teledyne Judson TE coole accessoies ae signed to povi solutions fo ou custoes. The CMAMP seies is signed fo custoes that would like a fully integated tecto odule. It inclus heatsinking, tecto signal aplification and tepeatue contol. We also offe heat sink asseblies without peaps o tepeatue contolles. Please ask custoe sevice fo Poduct Bulletin PB fo oe infoation. Opeating Cicuit The ecoend opeating cicuit fo ost applications is an opeational aplifie in a negative-feedback tansipedance configuation (Figue 7) with up to.v evese bias put acoss the tecto. This evese bias will incease the effective shunt ipedance of the tecto but will also incease the tecto /F noise. Coole / Peaplifie Recoendations Shunt Ipedance < Ω Recoend Coole Module CMAMP-TO-PA CMAMP-CN-PA Pat 9 9 Figue 7 ical Opeating Cicuit R F < V I DARK Ω KΩ > KΩ CMAMP-TO-PA CMAMP-CN-PA CMAMP-TO-PA7 CMAMP-CN-PA I S - V o = I S R F CMAMP assebly inclus heat sink, tepeatue contolle and tansipedance aplifie fo the J9TE packages. I sc V os + /

4 W NETable. µ Cutoff Roo Tepeatue and Theoelectically Cooled PV MCT, One Though Fou Stages (TE-) Shunt ipence Active Size Opeating % Cutoff (Oh) Diaete Tep. Wavelength Wavelength Responsivity Pat (A/W) () ( C) (µ) (µ) Mol J9:-8C-RU J9:-8C-RM J9TE:-C-RU J9TE:-C-RM J9TE:-C-RU J9TE:-C-RM J9TE:-C-RU J9TE:-C-RM J9TE:-CN-RU J9TE:-CN-RM J9TE:-VN-RU J9TE:-VN-RM TBA TBA E+ 7.E+.E+.E+ 7.E+ 7.E+.E+.E+.E+7.E+.E+7.E+.E+.E+.E+.E+.E+.E+ 8.E+ 8.E+.E+7.E+.E+7.E+ Dak -.V (A) Max.E-.E-.E-7.E-.E-8.E-7 E-9 E-8.E-9.E-8.E-9.E-8.E-.E-.E-.E-.E-7.E- E-8 E-7.E-8.E-7.E-8.E-7 D* KHz.E+.E+ 7.7E+ 9.7E+.E+.7E+.7E+.9E+ 7.E+ 9.E+ 8.E+.E+ E+.E+.E+.E+.9E+.7E+.9E+ 7.E+ 8.E+.E+ 8.E+.E+ All specs ae fo tecto opeation at V bias and 8 FOV unless othewise specified. Maxiu evese bias voltage fo all tectos is.v. Table. µ Cutoff Theoelectically Cooled PV MCT, One Though Fou Stages (TE-) Mol J9TE:-C-RU J9TE:-C-RM J9TE:-C-RU J9TE:-C-RM J9TE:-C-RU J9TE:-C-RM J9TE:-CN-RU J9TE:-CN-RM * J9TE:-VN-RU * J9TE:-VN-RM Shunt ipence Active Size Opeating % Cutoff (Oh) Diaete Tep. Wavelength Wavelength Responsivity Pat.. (A/W) () ( C) (µ) (µ) E+.E+ E+ E+.E+.E+.E+.E+.E+.E+.E+.E+.E+.E+.E+.E+ 7.E+ 7.E+.E+.E+ Dak Cuent (A) D* KHz Max E- E-.E-.E-.E-.E-.E-.E-.E-.E-.E-.E- 8.E- 8.E-.E-.E-.E-.E- 8.E- 8.E-.E+9.E+9 7.E+9 7.E+9.E+.7E+.7E+.E+.8E+.8E+.E+9.7E+9.E+.E+.E+.E+.8E+.E+.E+.8E+ All specs ae fo tecto opeation at V bias and 8 FOV unless othewise specified. * FOV. Maxiu evese bias voltage fo all tectos is.v. Highe esponsivity ay be achieved at evese bias. W NE Table. µ Cutoff Theoelectically Cooled PV MCT, One Though Fou Stages (TE-) Mol Active Size Opeating % Cutoff Diaete Tep. Wavelength Wavelength Responsivity Pat (A/W).. (µ) () ( C) (µ) J9TE:-C-RU J9TE:-C-RM J9TE:-C-RU 8 J9TE:-C-RM 9 J9TE:-C-RU J9TE:-C-RM J9TE:-CN-RU J9TE:-CN-RM * J9TE:-VN-RU * J9TE:-VN-RM 9 All specs ae fo tecto opeation at Maxiu evese bias voltage fo all Shunt ipence (Oh) -.7.E+.E+ -..E+.E+ -.9.E+ E+ -..E+ E+. 8.E+.E+.8 8.E+.E E+.E E+.E+ -9..E+.E+ -9..E+.E+ V bias and 8 FOV unless othewise specified. * FOV. tectos is.v. Highe esponsivity ay be achieved at evese bias. Dak Cuent (A) D* KHz Max.E-.E-.E-.E-.E-.E-.E-.E-.E-.E-.E-.E-.E-.E-.8E-.8E-.E-.E-.E-.E-.E+9 E+9.9E+9.9E+9.E+ E+.E+.E+.9E+.7E+ E+9.E+9 8.E+9 8.E+9.7E+.9E+.E+.E+.E+.E+ /

5 C/D Package CN Package. SQ.7 DIA. REF.. DIA.. Thk AR Coated Sapphie Window. Dia.. Clea Apetue. MAX. Top, Sealant Oute, Top Cap Sealant..7 TYP Di. "A".8 ±..9 ± REF. Theisto Catho (-) White Window." thick Ano (+) Geen Coole (-) Black Coole (+) Red N/C Clea 7 N/C Clea 8 Theisto Yellow Theisto pins..9 Coole (+).9 Yellow.7 dia holes (+) Ano (-) Catho. dia. Pin Cicle Backgound Pins Oitted. dia. Sleeve Colo Designation. Si View Pin No.. (no.) Di. "A" -stage:. -stage:. Top,.. ±. MAX C: AR Coated Sapphie Window D: Sapphie Window Si View Coole (-) Botto View 7S Package 8C Package.... Coole Cuent I (Aps) - V vs I Hot si = 7 C Coole Cuent I (Aps) - to ec t - -7 si Vv I tecto vs Tc. o t - t ec -9 Hot si = 7 C Coole Voltage V (Volts) - Cold Si Tepeatue Tc ( C) I tecto s vs Tc ole Co v V -7 Figue Tepeatue vs TE Coole Cuent Coole Voltage V (Volts) te - o ct Coole Voltage (Volts) to te c -. TD vs TH=7 C. Tepeatue TD ( C) - Figue 9 Tepeatue vs TE Coole Cuent Cold Si Tepeatue Tc ( C) Figue 8 Tepeatue vs TE Coole Cuent Coole Cuent I (Aps) /

6 In addition to ou Photovoltaic MCT poduct line, Teledyne Judson Technologies offes a wi ange of high pefoance standad, custo and space qualified tecto poducts and accessoies. Geaniu tectos and aays Indiu Aseni tectos and aays Indiu Antioni tectos and aays Mecuy Cadiu Tellui tectos and aays Lead Seleni tectos and aays Lead Sulfi tectos and aays Dewas, backfill and vacuu packages Theoelectic, Joule Thoson and closed cycle linea and otay cooles Peaplifies Tepeatue contolles and eadout electonics Please contact us fo oe infoation on these poducts at -8-9 o on the web at Coece Dive Montgoeyville, PA 89 USA Tel: -8-9, Fax: June, /