datasheet | june 2012 fiber optics | rev 2012.06 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. applications node capability narrow transmitter housing neworks with limited fiber architectures using separate optical wavelengths to carry targeted services features standard itu grid wavelengths advanced analog chip design reduces equipment requirements in the hub telecordia technologies tm 468 compliant wide temperature range ? stable even in harsh environments the 1751 laser module is a dense wavelength-division multiplexing (dwdm) laser for analog applications. it features a distributed feedback chip that has been designed specifically for radio frequen cy (rf) applications. the 1751 laser module has a wide temperature range for reliable performance in harsh node environments and narrow transmitter designs. it also features low adiabatic chirp to maximize signal quality in short and long lengths of fiber. the laser?s excellent inherent linearity minimizes degradation of the broadcast signals caused by quadrature amplitude modulated (qam) channels. the versatile 1751 laser module reduces cable network architecture fiber needs and lessens equipment reqirements in the hub. the 1751 is available in a wide range of standard itu wavelengths. the lasers are offered as either forward-path (40 mh z- 860 mhz) or return-path (5 mhz-210 mhz) modules. performance highlights parameters min typical max units available wavelengths (itu grid) 1527.99 - 1562.23 nm optical output powe r (multiple versions) 6-10 - - mw temperature case temperature range -40 - +85 ? c frequency range: return path forward path 5 40 - - 210 860 mhz mhz composite second order 50 - - dbc composite triple beat 60 - - dbc adiabatic chirp (measured at 500 mhz) 40 - 100 mhz/ma 1751A 1550 nm dwdm dfb laser module
datasheet | june 2012 fiber optics | rev 2012.06 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. absolute maximum ratings stresses in excess of the absolute maximum ratings can caus e permanent damage to the device. these are absolute stress ratings only. functional operation of the device is not implied at these or any other conditions in excess of those given in th e operational sections of the data sheet. exposure to absolute maximum ratings for extended periods can adversely affect device reliability. parameter symbol condition min max units operating case temperature t c continuous -40 +85 ? c storage temperature t stg - -40 +85 ? c laser forward dc current - - - 150 ma reverse voltage photodiode v rpd - - 10 v laser reverse voltage, dc v r - - 1 v esd - hbm: r = 1500 ohm, c = 100 pf -500 500 v tec current i tec continuous -1.7 1.7 a rf input power p rfin i f = i op - 62 dbmv electrical/optical characteristics laser temperature (tl) = 25 o c, i f =i op , beginning of life (bol) parameter symbol condition min typ max unit wavelength 1 op i f = i op , t = t op 1527.94 - 1563.1 nm optical output power p o 1751xxxx-06 version -08 version -10 version 6 8 10 - - - - - - mw mw mw slope efficiency se points measure @ i f = i th + 20 ma & i f = i th + 60 ma 0.16 0.19 - mw/ma optical isolation iso 30 - - db sidemode suppression ratio smsr 35 - - db laser relative intensity noise rin i f = i th + 70 ma, t = 25 ? c - <-155 - db/hz wavelength drift as case temp. is changed ?? i f = 60 ma, t = t op , tc varied from min ? max - - 0.04 nm threshold current i th - - 20 ma operating current i op - - 120 ma monitor pd responsivity r pd v rm =5v 10 - 200 a/mw thermistor resistance r th t op =25 ? c 9.5 10 10.5 k ? thermistor temperature coefficient tc th t op =25 ? c - -4.4 - %/ ? c tec current i tec -401751A 1550 nm dwdm dfb laser module
datasheet | june 2012 fiber optics | rev 2012.06 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. rf characteristic parameter symbol condition min typ max units frequency range 1 return path forward path f i f = 60 ma 5 40 - - 210 860 mhz mhz frequency response 1 return path version 5-210 mhz forward path version 40- 860 mhz - - i f = 60 ma, t op = 25 ? c - - 0.5 0.5 - - db db rf return loss 1 | s11 | - 16 - - db composite second order cso i f = i op note 2, 3, 4 and 5 50 - - dbc composite triple beat ctb i f = i op note 2, 3, 4 and 5 60 - - dbc carrier to noise ratio cnr i f = i op note 2, 3, 4 and 5 51 - - db adiabatic chirp fm i f = 60 ma, t = 25 ? c, measured at 500 mhz 40 - 100 mhz/m a nominal input impedance z in - - 25 - db 1. measured on a 50 ? resistively matched system. 2. i op is the bias point at which simultaneously the linearity, t he min. optical power and the required operating wavelength, ? op are obtained. 3. 8 channel loading with 10% omi and 40 km fiber length. 4. receiver thermal noise 8 pa*hz -0.5 , 0.5ma at ith+40ma, photodiode responsivi ty ~1.1a/w, noise bandwidth 4.2 mhz 5. forward band (fb=45-870 mhz): eight channel cw meas urement: channel frequencies set at 553.25, 559.25, 565.25, 571.25, 577.25, 583.25, 589.25, and 595. 25 mhz. ctb measured at 553.25, 577. 25, and 595.25 mhz. cso measured at 42 mhz 6. measured wavelength = operating wavelength with a tolerance of + 0.05 nm. electrical schematics figure 1. 1751A laser schematic figure 2. 1751A circuit schematic 1751A 1550 nm dwdm dfb laser module
datasheet | june 2012 fiber optics | rev 2012.06 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. outline diagrams (dimensions are in inches and millimeters) pin definitions pin description 1 thermistor 2 thermistor 3 dc laser bias (-) 4 mpd anode (-) 5 mpd cathode (+) 6 thermal electric cooler (+) 7 thermal electric cooler (-) 8 case ground 9 case ground 10 nc 11 laser common (+), case gnd 12 laser modulation (-) 13 laser common (+), case gnd 14 nc 1751A 1550 nm dwdm dfb laser module
datasheet | june 2012 fiber optics | rev 2012.06 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. laser safety this product meets the appropriate standard in title 21 of t he code of federal regulations (cfr). fda/cdrh class 1 laser product. this device has been classified with the fda/cdrh under accession number 0220191. all versions of this laser are class 3b laser prod uct, tested according to iec 60825-1:2007/en 60825-1:2007 single-mode fiber pigtail with sc/apc connectors (standard). wavelength = 1.5 ? m. maximum power = 30 mw. because of size constraints, laser safety labeling (including an fda class 1 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. 1751A 1550 nm dwdm dfb laser module 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 1 laser product iec-60825-1:20007 max. output:50 mw wavelength: 1.3 ? danger invisible laser radiation max. output: 50 mw, class 1 laser product avoid direct exposure to beam wavelength: 1.3 ? m
datasheet | june 2012 fiber optics | rev 2012.06 information contained herein is deemed reliable and accurate as of the issue date. emcore reserves the right to change the desi gn or specification at any time without notice. ordering code definitions 1751-19-bb-sc-10 family name 1751A, analog 1550 nm, dfb, dwdm frequency plan bb = both forward and return connectors fc = fc/apc sc = sc/apc pg = none (no connector) 1751A 1550 nm dwdm dfb laser module optical power min. 06 = 6 mw 08 = 8 mw 10 = 10 mw itu wavelength 19 = ch.19 20 = ch.20 21 = ch.21 22 = ch.22 23 = ch.23 24 = ch.24 25 = ch.25 26 = ch.26 27 = ch.27 28 = ch.28 29= ch.29 30 = ch.30 31 = ch.31 32 = ch.32 33 = ch.33 34 = ch.34 35 = ch.35 36 = ch.36 37 = ch.37 38 = ch.38 39 = ch.39 40 = ch.40 41 = ch.41 42 = ch.42 43 = ch.43 44 = ch.44 45 = ch.45 46 = ch.46 47 = ch.47 48 = ch.48 49 = ch.49 50 = ch.50 51 = ch.51 52 = ch.52 53 = ch.53 54 = ch.54 55 = ch.55 56 = ch.56 57 = ch.57 58 = ch.58 59 = ch.59 60 = ch.60 61 = ch.61 62 = ch.62
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