11.2 - P 2 11.2 Accoydin;jN C*0 f3/j.5-1 Ps'lYo It beam ~ =...

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P 2 11.2--: Accoydin;j- *0 f3-. (/j.5-1) ~ N = Ps'lYo C It )) fOY CL sifjr701 beam !if power Ps anJ freJ'uenc/f- j) he/'ll inCIdent en CL photoconductive detectoY, The sifjnal cuyrent i8 thus . (-Ie) = Ndl:)ev = ~ ( ..:.& ) D l..s J hv 'LL Is o.ncL {2 = ( fl ) 2t:LO ) 202 S hV (n IS -(/) Fro~ E3- (1/5-9) > {2 = 4- e f( To/rJ) LJ)) IV I + 4/f 1/,2y,2 Eg- (J) fjives the dc curren-t i 04 - e'e ( TD ) I=;;VnPs '2 - 4e2 ( -,-LI ( TD ) 2 ( Ps ) ilL) l-N - hV/ Td- 1+471I/,,'T02 In the presence c1 CL sl:ron~ opticaL backiJ Yound
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Unformatted text preview: the noise power {J becomes ~i = 4e2(ht)(~r(I++:~}Yo2 + fa) LJU ~ 4f2( h-~y(7i:YPBLJJ) TAus > power PB) (2) u.sln:; (J) Md (2) ~ we h~v~ 2 y; . s-iJ--(1f7 (Tfl Pt IT-V-U2(-;v7 ( ~Y PBLJ V p/t 4 PB /zVLJI/ SeHinif t = I > we ob/:o.in fiTe millimum deiectable power C0 ( PS)milV = 2 ( PBk'lVLJI/)!1...
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  • Fall '07
  • Wang
  • Trigraph, power Ps anJ, sifjnal cuyrent i8, hV/ TdCL sl

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