sil57474x siemens aktiengesellschaft page(1/7) 02/99 specification to-bidi* transceiver optical module coax-bidi ? 1310/1550 nm with dil10 adaptation board and receiver preamplifier 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 applications stable operation with high capacitance detectors low noise preamplifiers single-ended to differential conversion i-to-v converters preamp description 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 (C5.2 v) or a pecl (+5 v) power supply; the common mode at the output is ecl compatible.
sil57474x siemens aktiengesellschaft page(2/7) 02/99 maximum ratings module symbol values unit operating temperature range at case t c - 40... +85 c storage temperature range t stg - 40... +85 c soldering temperature tmax = 10 s, 2 mm distance from bottom edge of case t s 260 c laserdiode symbol values unit direct forward current i f max 120 ma radiant power cw f e 1mw reverse voltage v r max 2v monitor diode symbol values unit reverse voltage v r max 10 v characteristics all optical data refer to the optical port (10/125 m m sm fiber), t c =-40...+85c laser diode symbol values unit optical peak output power f e >0,4 mw emission wavelength center of range f e =0,2 mw l 1260...1360 nm spectral bandwidth f e =0,2 mw (rms) dl <5 nm threshold current i th 2...55 ma forward voltage f e =0,2 mw v f < 1,5 v slope efficiency h 10...150 mw/a differential series resistance r s < 8 w rise time/fall time t r , t f < 1 ns
sil57474x siemens aktiengesellschaft page(3/7) 02/99 monitor diode symbol values unit dark current, v r =5v, f e = 0 i r <200 na photocurrent, f e =0,2mw 30...400 a capacitance, v r =5v, f = 1mhz c 5 <10 pf tracking error, v r =2v (see note 1) te -1...1 db detector + preamplifier symbol values unit min. typ. max. power supply tmin to tmax operating range single supply current +4.5 +5 25 +11 26 v ma bandwidth 3db 180 240 mhz overload -6 dbm sensitivity (ber > 10 -10 ; popt.(transmitter) < -7dbm; imod < 40ma) -22 dbm output noise: (minimum s/n > 10 (2,4v/mw / 0,2v/mw) -> equivalent to ber > 10 -10 ) signal: output voltage to optical power (input power < 100 w tbd) single ended s l * r trs differential s l * r trs 2,4 4,8 6 12 0,2 12 24 v/mw v/mw v/mw module symbol values unit optical crosstalk (see note 2) crt <-27 db note 1: the tracking error te is the variation rate of f e at constant current i mon over a specified temperature range and relative to the reference point: i mon,ref =i mon (t=25c, f e = 0,2mw). thus, te is given by: te db tc c ec e e = - 10 25 25 log f f f note 2: optical crosstalk is defined as crt=10 * log(i det,0 /i det,1 ) with: i det,0 the photo-current with f e =0,2mw, cw laser operation, v r =2v, with minimum optical return loss from fiber end and i det,1 the photocurrent without f e , but 0,2mw optical input power, l = 1300nm.
sil57474x siemens aktiengesellschaft page(4/7) 02/99 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) imodmax and change u3 to u3corr = u3*imodmax [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 accompanying information t = 25 c: threshold current, current above threshold for 0.2 mw output power, monitor current for 0.2 mw output power, peak wavelength. t = 85 c: threshold current, current above threshold for 0.2 mw output power, monitor current for 0.2 mw output power.
sil57474x siemens aktiengesellschaft page(5/7) 02/99 end of life values parameter symbol values unit threshold current at t = 85 c i th 80 ma slope efficiency ( - 40...+ 85 c) s > 5 mw/a tracking error ( see note 1 ) te - 1.0...1.0 db detector dark current, v r = 2 v, t = 85 c i r < 400 na monitor dark current, v r = 2 v, t = 85 c i r < 1 a fiber pigtail type: single mode, silica parameter values unit mode field diameter 9 1 m cladding diameter 125 2 m mode field/cladding concentricity error < 1 m cladding non-circularity < 2 % mode field non-circularity < 6 % cut-off wavelength > 1270 nm jacket diameter 0.9 0.1 mm bending radius > 30 mm allowed tensile strength fiber/case max. 5 n length 1 0.2 m
sil57474x siemens aktiengesellschaft page(6/7) 02/99 laser diode radiant power in singlemode fiber relative radiant power f e = f ( l ) forward current in ma optical power in mw 0 10 20 30 40 50 60 70 80 90 100 1306 1308 1310 1312 1314 wavelength in nm relative optical power laser forward current i f = f ( v f ) monitor diode dark current i r = f ( t a ) f port = 0, v r = 5 v 0 10 20 30 40 50 60 70 80 90 100 00.40.81.21.6 forward voltage in v forward current in ma 0.01 0.1 1 10 100 1000 -50 0 50 100 temperature in c dark current in na
sil57474x siemens aktiengesellschaft page(7/7) 02/99 package outlines (dimensions in mm): coaxial module have to be mechanical fixed. only soldered pins doesnt fulfill mechanical connection of the coaxial module. preferred for mechanical connection is our laser flange.
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