AFBR-1310Z / afbr-1310xz fiber optic transmitter for multi ghz analog links data sheet description the afbr-1310xz is a compact, high performance, cost efective transmitter for multi ghz analog communication over single mode optical fber. the transmitter incorporates a linear wide bandwidth ingaasal/inp fabry-perot laser packaged inside a to- header, coupled to a single mode fber pigtail terminated with a standard fc/pc connector (or an sc/apc connector, or an lc/pc connector), a monitor photodiode for closed loop operation, a 50 ohm input impedance linear rf amplifer and a bias network that allows to separately control the laser average output power. the transmitter operates at a nominal wavelength of 1310 nm. access to rf input, electrical control signals i/os and amplifer supply is through a fexible printed circuit board. the rf input is self biased and ac coupled, and thus does not require an external dc block. a suitable bracket is used to mount the transmitter onto a pcb or metal substrate. the high output power and conversion gain allow for a high splitting ratio in branched passive optical networks. features ? compact package ? uncooled operation in a wide temperature range ? high performance 1310 nm fabry-perot laser ? built-in high performance rf amplifer ? floating monitor photodiode for fexibility in control loop design ? single mode fber pigtailed output with standard fc/ pc connector (AFBR-1310Z) ? sc/apc pigtail option available (afbr-1310az) ? lc/pc pigtail option available (afbr-1310bz) ? low power consumption ? flex interconnect to customer pcb ? minimal external circuitry required ? rohs6 compliant ? pairs to afbr-2310z receiver for multi ghz analog links specifcations ? nominal 50 ohm rf input impedance ? 5 mw typical output power at 50 ma laser current (room temperature) ? 5 v rf amplifer supply voltage ? 200 mhz to 5.5 ghz frequency range ? 20 mw/v typical slope efciency/conversion gain applications ? analog optical links for satellite signal distribution ? in-building antenna remote systems
2 table 1. absolute maximum ratings [1] parameter symbol minimum typical maximum unit notes storage temperature (non-operating) ts -40 85 c operating temperature ta -40 85 c relative humidity (non condensing) rh 85 % rf amplifer supply voltage 0 5.5 v rf amplifer input power pin 20 dbm rf amplifer input dc voltage vin 6 v laser bias current (direct) i bias 100 ma laser bias reverse voltage 2 v monitor photodiode reverse voltage v r 15 v monitor photodiode direct current 5 ma flex soldering temperature 300 c for manual soldering, no longer than 2 sec/pad. it is advisable to pre-heat the customer pcb. esd capability (hbm) v esdhbm 250 v notes: 1. absolute maximum ratings are those values beyond which functional performance is not intended, device reliability is not implied, and damage to the device may occur. table 2. recommended operating conditions [2] parameter symbol minimum typical maximum unit notes operating temperature ta -40 85 c relative humidity (non condensing) rh 80 % rf amplifer supply voltage v cc 4.75 5 5.25 v monitor photodiode reverse voltage v r 2 5 10 v notes: 2. typical operating conditions are those values for which functional performance and device reliability is implied.
3 table 3. electro-optical specifcations parameter symbol conditions min. nom. max. unit notes output power p o 25 c, i f = 60 ma 5 mw laser threshold current i th t = 25 c t = 85 c 15 30 ma laser operating current i op p o = 5 mw, t = 25 c t = 85 c 60 95 ma laser wavelength p o = 5 mw, cw, t = 25 c 1290 1310 1330 nm laser spectral width ? p o = 5 mw, cw, over temperature 3 nm rms temperature coefcient of wavelength ?/t 0.6 nm/c laser slope efciency over temperature, cw 0.08 0.12 0.2 w/a relative intensity noise rin cw, 0.2 to 5.5 ghz, 5 mw lop -120 db/hz monitor photo current i mon p o = 5 mw over temperature cw 0.4 2.5 ma dark current i dark at vr = 5 v 0.1 a monitor photodiode capacitance c mon 5 50 pf monitor tracking accuracy [3] ta p o = 5 mw over temperature cw -1.0 +1.0 db rf input impedance z in 50 conversion gain g t = 25 c 20 mw/v bandwidth at -3db bw in electrical domain 5.5 ghz gain ripple (peak to peak) 0.2 to 5.5 ghz +/- 3 db gain temperature dependence -40 to +85 c +/- 2 db low frequency cut-of 50 mhz third order input intercept point iip3 f = 5.4 ghz +8 dbm second order input intercept point iip2 f o = 2.7 ghz, dual tone technique +15 dbm rf amplifer supply current icc vcc = 5 v 65 88 ma notes: 3. monitor tracking accuracy is defned as: max | 10log(po/po@25 c) |
4 table 4. pigtail parameters parameter AFBR-1310Z afbr-1310az afbr-1310bz optical connector fc/pc sc/apc, 8 angle lc/pc fibre type single mode single mode single mode fibre length 0.5 0.05 m 0.5 0.05 m 0.5 0.05 m secondary coating diameter 0.9 mm 0.9 mm 0.9 mm return loss of optical connector 35 db minimum 45 db minimum 35 db minimum schematic diagram figure 1. schematic diagram figure 2. electrical pinout (top view after 90 bending of the fexible pcb) package information the afbr-1310xz transmitter is housed in a robust to header. the amplifer portion is hosted on a fex/rigid printed circuit. the fber pigtail jacket is made of hytrel. the fex circuit can be soldered to the customer pcb by hand soldering or with automatic equipment (like hot bar). table 5. pinout pad function 1 monitor photodiode cathode (foating) 2 laser bias (anode) 3 ground 4 rf in 5 ground 6 rf amplifer supply 7 monitor photodiode anode (foating) 1 mpd cathode (foating) 2 laser bias (anode) 3 ground 4 rfin 5 ground 6 rf amp [pwer supply 7 mpd anode (foating) rf 4 rfin 2 laser bias (anode) 1 monitor photodiode cathode fabry- perot laser monitor photodiod single mode ber pigtail optical connector (fc/pc or sc/apc or lc/pc) 3 ground 5 ground 6 rf amp power supply 7 monitor photodiode anode
5 figure 3. mechanical layout of analog transmitter. the fex is shown before 90 bending. all dimensions are in [mm] optical connector fiber length 500 50 2.9 12.7 17 12.2 5 sti? part of ?ex board containing smd components 1.5 max 8.5 r3.7 3.3 2.3 21.5 2.5 0.8 1 1.2 r0.5 r0.7 2.3 6.8 16.8 4 6.9 r3 r0.7 r0.5 r0.1 0.4 2.3 r0.2 1.2 1 0.8
for product information and a complete list of distributors, please go to our web site: www.avagotech.com avago, avago technologies, and the a logo are trademarks of avago technologies in the united states and other countries. data subject to change. copyright ? 2005-2013 avago technologies. all rights reserved. av02-3184en - september 13, 2013 pcb 3.2 3.6 3.2 6.9 figure 4. example of fex bending when soldered onto a pcb. all dimensions are in [mm] handling information when soldering the fex to the customer pcb, it is advisable to avoid heating or touching with the hot iron the fber pigtail, the header to fex interconnections and the region of the fex where the amplifer and passive components are present. this device is sensitive to esd discharge. to protect the device, its important to use normal esd handling pre- cautions. these include use of grounded wrist straps, work-benches and foor wherever the device is handled. mounting hardware an omega shaped bracket is pre-assembled to the to header, for easy mounting of the transmitter to the customer pcb or better to a metal case. laser safety the afbr-1310xz is a class 1m product, according to the cei iec international standard 60825-1, second edition 2007-03. invisible radiation is emitted from the fber connector, do not view directly with optical instruments. recommended application circuit figure 5 shows the recommended application circuit. proper 50 ohm controlled impedance traces are required on the laser bias, rf input and rf amplifer power supply connections. 50 ohm terminations, in parallel to bias inductors, are required on the laser bias and rf amplifer power supply connections. additionally, fltering caps are required on the bias lines. figure 5. recommended application circuit to laser control circuit preceding ampli?er stage 50 ohm 1 nf 15 nh vcc = 5 v 100 nf rf in laser bias (anode) rf ampli?er supply mpd cathode rf amp fabry- perot laser monitor photodiode 50 ohm 1 nf 15 nh from laser control circuit 100 nf to laser control circuit ground ground mpd anode
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