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| 6,/[ 3URSRVDO 6SHFLILFDWLRQ 72%,', 7UDQVFHLYHU 2SWLFDO 0RGXOH &RD[%,',TM QP ZLWK ',/ $GDSWDWLRQ %RDUG DQG 5HFHLYHU 3UHDPSOLILHU * * * * * * * * * * Designed for application in passive-optical networks Integrated Wavelength Division Multiplexer Bidirectional Transmission in 2nd and 3rd optical window Laser diode with Multi-Quantum Well structure Suitable for bit rates up to OC-3 and STM-1 Ternary Photodiode at rear mirror for monitoring and control of radiant power Low noise/high bandwidth PIN diode Hermetically sealed subcomponents, similar to TO 18 With singlemode fiber pigtail DIL10 adaptation board with receiver preamplifier $SSOLFDWLRQV Stable Operation with High Capacitance Detectors Low Noise Preamplifiers Single-Ended to Differential Conversion I-to-V Converters 3UHDPS GHVFULSWLRQ The TIA is a wide bandwidth, single supply transimpedance amplifier optimized for use in a fiber optic receiver circuit. It is a complete, single chip solution for converting photodiode current into a differential voltage output. The 240 MHz bandwidth enables application in FDDI receivers and SONET/SDH receivers with data rates up to 155 Mbps. The differential outputs drive ECL directly, or can drive a comparator/ fiber optic post amplifier. The IC can be used with a standard ECL power supply (- 5.2 V) or a PECL (+5 V) power supply; the common mode at the output is ECL compatible. Siemens Aktiengesellschaft page(1/6) January 1998 6,/[ 0D[LPXP 5DWLQJV Module Operating Temperature range at case Storage Temperature range Soldering Temperature Tmax = 10 s, 2 mm distance from bottom edge of case Laserdiode Direct forward current Radiant power CW Reverse Voltage Monitor Diode Reverse Voltage &KDUDFWHULVWLFV All optical data refer to the optical port (10/125m SM fiber), TC = -40 ... +85C Laser Diode Optical Peak Output Power Emission wavelength center of range e = 0.2 mW Spectral bandwidth e = 0.2 mW (RMS) Threshold current Forward voltage e = 0.2 mW Slope Efficiency Differential series resistance Rise Time/Fall Time Ith VF RS tR, tF <5 2...55 < 1.5 10...150 <8 <1 nm mA V mW/A ns Symbol e Values > 0.4 1510...1590 Unit mW nm Symbol TC Tstg TS Values -40 ... +85 -40 ... +85 260 Unit C C C Symbol IF max e VR max Symbol VR max Values 120 1 2 Values 10 Unit mA mW V Unit V Siemens Aktiengesellschaft page(2/6) January 1998 6,/[ Monitor Diode Dark Current, VR = 5 V, e = 0 Photocurrent, e = 0.2 mW Capacitance, VR = 5 V, f = 1MHz Tracking Error, VR = 2 V (see note 1) Symbol IR Values < 200 100...800 Unit nA A pF dB C5 TE < 10 -1...1 Detector + Preamplifier Power Supply Tmin to Tmax Operating range single supply Current Bandwidth 3 dB Overload Sensitivity (BER > 10 ; Popt (Transmitter) < -7dBm; Imod < 40mA) under discussion Output Noise: (Minimum S/N > 10 (2.4 V/mW / 0.2 V/mW) -> equivalent to BER > 10-10) Signal: Output voltage to optical power (Input power < 100 W tbd) Single Ended S * Rtrs Differential S * Rtrs 0RGXOH Optical Crosstalk (see note 2) Note 1: -10 6\PERO Min. +4.5 180 -25 9DOXHV Typ. +5 25 240 -6 Max. +11 26 8QLW V mA MHz dBm dBm 0.2 V/mW 2.4 4.8 6\PERO CRT 9DOXHV < -30 6 12 12 24 V/mW V/mW 8QLW dB The tracking error TE is the variation rate of e at constant current Imon over a specified temperature range and relative to the reference point: Imon,ref = Imon(T = 25C, e = 0.2 mW). Thus, TE is given by: 7( Note 2: G% = 10 x log H 7 F - H 2 5 & H 2 5 & photocurrent without e, but 0.2 mW optical input power, = 1300nm. Optical Crosstalk is defined as CRT=10*log (IDet,0 / IDet,1) with: IDet,0 the photo-current with e = 0.2 mW, CW laser operation, VR = 2 V, with minimum optical return loss from fiber end and IDet,1 the Siemens Aktiengesellschaft page(3/6) January 1998 6,/[ Proposal for Measuring Crosstalk Needed equipment: * * * Average Voltmeter (R&S URV5) Lowpassfilter 125 MHz Signalgenerator (Pseudorandom Word generator 155 Mbit/s or Sine wave frequency tbd) Measuring Connect the preamplifier output (perhaps with an additional amplifier - not limiting!!!) with Average Voltmeter Step 1 Output voltage without any incoming optical signal, BIDI internal transmitter off -> Uo Step 2 Output voltage with incoming optical signal 1 W 100% modulated (Pseudorandom Word 155 Mbit/s) light, BIDI internal transmitter off -> U1 Step 3 Output voltage without any incoming optical signal, BIDI internal transmitter modulated (Pseudorandom Word 155 Mbit/s) 10 mApp bias 5 mA (below threshold) > U3 Step 4 Output voltage without any incoming optical signal, BIDI internal transmitter modulated (Pseudorandom Word 155 Mbit/s) 10 mApp bias 25 mA (over threshold) > U4 Calculations: Check the difference U3 (only electrical crosstalk) and U4 electrical + optical crosstalk (electrical crosstalk is dominating if U4 = U3; optical crosstalk is dominating if U4 > U3) Check the needed modulation current for W 100% modulated light (EOL max temp) I mod max and change U3 to U3corr = U3*Imod max [mA]/10. The same procedure for U4. TO_BIDI Performance U1 should be > 10 * Uo Normally the sensitivity will be limited by crosstalk. The needed optical power is Poptical min [W] = 10*U4corr/U1 Siemens Aktiengesellschaft page(4/6) January 1998 6,/[ Accompanying Information T = 25C: T = 85C: Threshold current, current above threshold for 0.2 mW output power, monitor current for 0.2 mW output power, peak wavelength. Threshold current, current above threshold for 0.2 mW output power, monitor current for 0.2 mW output power. End of Life Values Parameter Threshold current at T = 85 C Slope efficiency (- 40...+ 85 C) Tracking error (VHH QRWH ) Detector dark current, VR = 2 V, T = 85 C Monitor dark current, VR = 2 V, T = 85 C Symbol Values 80 >5 - 1.0...1.0 < 400 <1 Unit mA mW/A dB nA A Ith S TE IR IR Fiber Pigtail Type: single mode, silica Parameter Mode field diameter Cladding diameter Mode field/cladding concentricity error Cladding non-circularity Mode field non-circularity Cut-off wavelength Jacket diameter Bending radius Allowed Tensile strength fiber/case Length Values 91 125 2 <1 <2 <6 > 1270 0.9 0.1 > 30 max. 5 1 0.2 Unit m m m % % nm mm Mm N m Siemens Aktiengesellschaft page(5/6) January 1998 6,/[ Laser Diode Radiant Power in Single mode Fiber 0.4 0.3 0.3 0.25 Relative Radiant Power e = f() 100 90 5HODWLYH 2SWLFDO 3RZHU 80 70 60 50 40 30 20 10 0 1306 1308 1310 1312 1314 Optical Power in mW 0.2 0.15 0.1 0.05 0 0 5 10 15 20 Forward Current in mA :DYHOHQJWK LQ QP Laser Forward Current Monitor Diode Dark Current IR = IF = f(VF) 100 90 )RUZDUG &XUUHQW LQ P$ 80 70 60 50 40 30 20 10 0 0 0 .4 0 .8 1 .2 1 .6 )RUZDUG 9ROWDJH LQ 9 f(TA) port = 0, VR = 5 V 1000 100 'DUN &XUUHQW LQ Q$ 10 1 0 .1 0 .0 1 -5 0 0 50 100 7HPSHUDWXUH LQ & Package Outlines (Dimensions in mm): Coaxial modules have to be mechanically fixed. Only soldered pins do not fulfill mechanical connection of the coaxial module. Preferred for mechanical connection is our laser flange. Siemens Aktiengesellschaft page(6/6) January 1998 |
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