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high-power 10 gbit/s modulated source data sheet may 2002 the high-power 10 gbits/s modulated source features a dfb cw laser spliced to a 10 gbit/s, dual-drive lithium-niobate modulator, 2723CXXX. features itu wavelengths available from 1529.55 nm?1610.06 nm integrated optical isolator industry-standard, 14-pin butterfly package narrow linewidth patented dual-drive technology with gpo connec- tors minimum bandwidths of 8.5 ghz tunable, zero-chirp operation use of ic chip due to low drive voltages pmf fiber splice high reliability and hermetic packages applications digital high-speed telecommunications: ? sonet: oc-1 through oc-192 ? sdh: stm-1 6, stm-64 ? undersea communications internet data communications description the d2525p family of dfb laser modules is designed to be used with a lithium-niobate external modulator (see table 5). the laser module features a polarization-maintaining fiber (pmf) pigtail, enabling it to be directly connected to the modulator via a fiber splice. the module contains a multiquantum-well (mqw), distributed-feedback (dfb) laser. this device nominally has an outp ut power of 10 mw. the wavelength of the laser can be temperature-tuned for more precise wavelength selection by adjusting the temperature of the internal thermoelectric cooler. the laser module is fabricated in a 14-pin, hermetic, metal/ceramic butterfly pack age that incorporates a bias tee that separates the dc-bias path from the rf input. the rf input has a nominal 25 ? impedance. the 10 gbits/s 2623w dual-drive modulator uses an integrated mach-zehnder configuration to convert single-polarization cw light from a semiconductor (dfb) laser into a time-varying optical output signal. the patented dual-drive configuration and ti-diffu- sion process is a standard feature on this modulator.
data sheet high-power 10 gbit/s modulated source may 2002 2 2 agere systems inc. description (continued) with this design configuration, tunable chirp transmis- sion for maximum reach can be achieved. also, bal- anced drive voltages can produce zero-chirp operation. low drive voltages enable the use of ic chip drivers such as the agere systems tmod0110g, which sup- ports a small and low-co st driver solution. controlled feedback (d2625p) the module contains an internal optical isolator that suppresses optical feedback in laser-based, fiber-optic systems. light reflected back to the laser is attenuated a minimum of 30 db. controlled temperature (d2525p) an integral thermoelectric cooler (tec) provides stable thermal characteristics. t he tec allows for heating and cooling of the laser chip to maintain a temperature of 25 c for case temperatures from ?40 c to +70 c. the laser temperature is monitored by the internal ther- mistor, which can be used with external circuitry to con- trol the laser chip temperature. controlled power (d2525p) an internal, ingaas, pin photodiode functions as the back-facet monitor. the photodiode monitors emission from the rear facet of the laser and, when used in con- junction with control circuitry, can control optical power launched into the fiber. normally, this configuration is used in a feedback arrangement to maintain consistent laser output power. pin information 1. a positive current through the thermoelectric heat pump cools the laser. 2. for optimum performance, both leads should be grounded. table 1. pin descriptions pin name 1 thermistor 2 thermistor 3 laser dc bias (cathode) (?) 4 back-facet monitor anode (?) 5 back-facet monitor cathode (+) 6 thermoelectric cooler (+) 1 7 thermoelectric cooler (?) 1 8 case ground 9 case ground 10 case ground 11 laser anode (+) 2 12 rf laser input cathode (?) 13 laser anode (+) 2 14 case ground 15 rf/dc input data or data 16 rf/dc input data or data figure 1. circuit schematic 2623w 43 ? 0.2 f 43 ? 0.2 f top view. 1-567 tec l1 160 nh isolator r1 20 ? package grounds ?+ ++ 765 4 32 1 8 9 10 11 12 13 th 10 k ? 14 15 16 d2525p
data sheet may 2002 high-power 10 gbit/s modulated source 3 agere systems inc. absolute maximum ratings stresses in excess of the absolute maximum ratings ca n cause permanent damage to the device. these are abso- lute stress ratings only. functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. exposure to absolute maximum ratings for extended periods can adversely af fect device reliability. * does not apply to shipping container. parameter symbol min max unit d2525p storage case temperature range* t stg ?40 70 c operating case temperature range t c ?40 70 c laser reverse voltage v rlmax ?2 v dc forward current i flmax ? 225 ma photodiode reverse voltage v rpdmax ?10 v photodiode forward current i fpdmax ?2 ma 2623w storage temperature t stg ?40 85 c operating temperature t op 070 c optical input power at 1.5 mp in ?30 mw rf voltage (peak to peak) v rf ?10 v dc voltage (rf input) vdc rf ?20 20 v
data sheet high-power 10 gbit/s modulated source may 2002 4 4 agere systems inc. handling precautions power sequencing to avoid the possibility of damage to the laser module from power supply switching transients, follow this turn-on sequence: 1. all ground connections 2. most negative supply 3. most positive supply 4. all remaining connections reverse the order for the proper turn-off sequence. electrostatic discharge caution: this laser device is susceptible to dam- age as a result of electrostatic dis- charge. take proper precautions during both handling and testing. follow guide- lines such as jedec publication no. 108-a (dec. 1988). agere systems employs a human-body model (hbm) for esd-susceptibility test ing and protec tion-design evaluation. esd voltage thresholds are dependent on the critical parameters used to define the model. a standard hbm (resistance = 1.5 k ? , capacitance = 100 pf) is widely used and, therefore, can be used for comparison purposes. the hbm esd threshold show here was obtained using these circuit parameters: mounting instructions the minimum fiber bend radius is 1.0 in. (25.4 mm). to avoid degradation in performance, mount the mod- ules on the board as follows: 1. place the bottom flange of the laser module on a flat heat sink at least 0.5 in. x 1.180 in. (12.7 mm x 30 mm) in size. the surface finish of the heat sink should be better than 32 in. (0.8 m), and the sur- face flatness must be better than 0.001 in. (25.4 m). using thermal conductive grease is optional; how- ever, thermal performance can be improved by up to 5% if conductive grease is applied between the bot- tom flange and the heat sink. 2. mount four #2-56 sc rews with fillister heads (m2-3 mm) at the four screw hole locations (see out- line diagram). the fillister head diameter must not exceed 0.140 in. (3.55 mm). do not apply more than 1 in.-lb. of tor que to the screws. 3. for the modulator, mount a minimum of two #4-40 screws into the two center screw holes located on the bottom of the package (see outline diagram). do not apply more than 5.2 in.-lb. of torque to the screws. parameter value unit human-body model >400 v
data sheet may 2002 high-power 10 gbit/s modulated source 5 agere systems inc. characteristics * standard operating condition is 5.0 v reverse bias. ? ratio of thermistor resistance at 0 c to thermistor resistance at 50 c * custom wavelengths available. ? the st ferrule key is not aligned to slow axis of fiber. connector is intended for testing purposes only. table 2. electrical characteristics, d2525p (at 25 c laser temperature) parameter symbol test conditions min typ max unit threshold current i th ??1535ma drive current above threshold ? l f = 10 mw ? ? 110 ma laser forward voltage v lf l f = 10 mw (cw) ? 1.3 1.8 v laser submount temperature t laser ?20?30c monitor reverse-bias voltage* v rmon ?3510v monitor current i rmon p o = 10 mw (cw) 0.2 ? ? ma monitor dark current i d i f = 0, v rmon = 5 v ? 0.01 0.1 a input impedance z in ??25? ? thermistor current i tc ?10?100 a resistance ratio ? ??9.19.610.1? thermistor resistance r th t l = 25 c 9.5 ? 10.5 k ? tec current i tec t l = 25 c, t c = 70 c ? ? 1.0 a tec voltage v tec t l = 25 c, t c = 70 c ? ? 2.0 v tec capacity ? tt c = 70 c ? ? 50 c table 3. optical characteristics, d2525p (at 25 c laser temperature) parameter symbol test conditions min typ max unit peak optical output power p p ? 10.0 ? ? mw center wavelength* (see table 4.) c t l = 25 c cw wavelength 1529.55 ? 1610.06 nm line width (3 db full width) ? cw, p f = 10.0 mw ? 2 10 mhz relative intensity noise rin cw, p f = 10.0 mw, 200 mhz < f < 10 ghz ? ? ?135 db/hz side-mode suppression ratio smsr cw 35 45 ? db optical isolation ? t c = 0 c to 75 c 30 ? ? db optical polarization extinction ratio ? ? 0 c to 75 c 20 ? ? db wavelength drift (eol) ? tested over 25 yr. lifetime 0.1 nm wavelength drift vs. case temperature ? ? ? ? 1 pm/c
data sheet high-power 10 gbit/s modulated source may 2002 6 agere systems inc. characteristics (continued) * bandwidth stated is electrical-optical-e lectrical as determined by the frequency respons e of the received rf electrical power (after the photo- diode) and measured relative to the rf electrical power used to drive the modulator. this respons e is referenced to the value a t 130 mhz. 2623w characteristic curves figure 2. magnitude of electro-optic response, 0.130 mhz?20 ghz table 4. optical/electrica l characteristics, 2623w parameter min typ max unit operating wavelength 1525 ? 1620 nm insertion loss ? ? 6.0 db combined module output power (under operat- ing current and modulation voltage) ?4 ? ? dbm extinction ratio at dc 20 ? ? db extinction ratio at rf 12 ? ? db s11 optical return loss ? ? ?30 db bandwidth* 8 ? ? ghz drive voltage (v ) at 1 ghz 2.0 2.4 2.6 v/side s11 electrical return loss (0.3 mhz?5 ghz) ? ? ?13 db s11 electrical return loss (5 ghz?10 ghz) ? ? ?10 db s11 electrical return loss (10 ghz?18 ghz) ? ? ?6 db dbe cor avg start 0.130 000 000 ghz stop 20.000 000 000 ghz 0.130 000 000 ghz pkg id 01499051 log mag 3 db/ ref ?56.49 db 1: ?55.832 db e/o ch1 w/a 4 hid (opt a, rf a [5%]) 4: ?62.491 db 9.3804 ghz 2: ?56.491 db .9248 ghz 3: ?59.491 db 9.3335 ghz sma 1 2 4 3
data sheet may 2002 high-power 10 gbit/s modulated source 7 agere systems inc. characteristics (continued) figure 3. s11 electrical return loss figure 4. output power vs. bias voltage dbe cor start 0.130 000 000 ghz stop 20.000 000 000 ghz 0.924 000 000 ghz log mag 5 db/ ref 0 db 1: ?18.545 db s11 ch1 hid 4: ?7.0697 db 6.3240 ghz 2: ?18.88 db 3.8099 ghz 3: ?11.186 db 9.3695 ghz 2 4 3 pkg id 010199069 (rf a ) 1 0 ?10 ?20 ?30 ?40 ?50 ?20 ?10 0 10 20 pkg id 011499051 modulator dc bias voltage (v) a-side optical power out (db)
data sheet high-power 10 gbit/s modulated source may 2002 8 8 agere systems inc. outline diagrams dimensions are in inches a nd (millimeters). tolerances ar e 0.005 in. (0.127 mm). d2525p 0.180 (4.56) heat sink 0.215 (5.45) 0.056 (1.42) 0.030 (0.75) 0.10 (2.5) 0.260 (6.60) 0.215 (5.47) ref 0.036 (0.91) pin 1 0.078 (1.98) 0.100 (2.54) typ 0.105 (2.67) dia typ (4) places 0.020 (0.51) typ 0.500 (12.70) min strain relief pin 14 trademark, code, laser serial number, and date code in approx. area shown 0.200 (5.08) ~ 1.025 (26.04) 0.10 0.002 (2.54 0.051) 0.213 (5.40) typ 0.500 (12.70) 0.350 (8.89) 0.605 (15.37) max 2.03 (51.6) 0.863 (21.91) 0.575 (14.61) 0.820 (20.83) 0.700 (17.78) 0.365 (9.27) max 1.180 (29.97)
data sheet may 2002 high-power 10 gbit/s modulated source 9 agere systems inc. outline diagrams (continued) dimensions are in inches and (millimeters). 2623w spliced assembly bend limiter 2 places agere electro-optic device model s/n 2623w xxxx 31 1 (787 25.4) maximum loose tube jacketed fiber 014097001 0.32 (8.13) 0.43 6x #4-40 unc-2b 0.15 (3.81) min depth 4.64 (117.86) 0.60 (15.2) 0.39 (9.91) 2.00 (50.8) 0.09 (2.29) (10.92) input 2.00 (50.8) 1.08 (27.43) 0.21 (5.33) 0.20 (5.11) 0.30 (7.62) lc connector 44 2 (1117.6 50.8) 20 2 (508 50.8 ) 2.25 (57.15) 2623w agere
data sheet high-power 10 gbit/s modulated source may 2002 10 agere systems inc. class iiib laser product fda/cdrh class iiib laser pr oduct. all versions are cla ss iiib laser products per cdrh, 21 cfr 1040 laser safety requirements. the device has been classi fied with the fda under accession number 8720010. this product complies with 21 cfr 1040.10 and 1040.11. 8 m/125 m 3 m single-mode fiber with 900 m loose-tube jacketed fiber and connector wavelength = 1.5 m maximum power = 40 mw because of size constraints, laser safety labeling (includi ng an fda class iiib label) is not affixed to the module but attached to the outside of the shipping carton. product is not shipped with power supply. caution: use of controls, adjustments, and procedures other than those specified herein may result in hazardous laser radiation exposure. danger invisible laser radiation is emitted from the end of fiber or connector avoid direct exposure to beam do not view beam directly with optical instruments invisible laser radiation emitted from end of fiber or connector avoid exposure to beam class iiib laser product fda/cdrh, 21 cfr 1040 max. output: 40 mw wavelength: 1.5 m
data sheet high-power 10 gbit/s modulated source may 2002 agere systems inc. reserves the right to make changes to the product(s) or information contained herein without notice. no liab ility is assumed as a result of their use or application. agere, agere systems, and the agere logo are trademarks of agere systems inc. copyright ? 2002 agere systems inc. all rights reserved may 2002 ds02-258ocn for additional information, contact your a gere systems account manager or the following: internet: http://www.agere.com e-mail: docmaster@agere.com n. america: agere systems inc., 555 union boulev ard, room 30l-15p-ba, allentown, pa 18109-3286 1-800-372-2447 , fax 610-712-4106 (in canada: 1-800-553-2448 , fax 610-712-4106) asia: agere systems hong kong ltd., suites 3201 & 3210-12, 32/f, tower 2, the gateway, harbour city, kowloon tel. (852) 3129-2000 , fax (852) 3129-2020 china: (86) 21-5047-1212 (shanghai), (86) 10-6522-5566 (beijing), (86) 755-695-7224 (shenzhen) japan: (81) 3-5421-1600 (tokyo), korea: (82) 2-767-1850 (seoul), singapore: (65) 6778-8833 , taiwan: (886) 2-2725-5858 (taipei) europe: tel. (44) 7000 624624 , fax (44) 1344 488 045 ordering information table 5. ordering information device codeitu frequency (thz)wav elength (nm)comcode 2723CXXX 186.2?196.0 1529.55?1610.06 contact your local sales representative * iec is a registered trademark of the inte rnational electrotechnical commission.

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