datasheet | december 2013 fiber optics | rev 2013.12 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 catv broadcast networks networks with limited fiber architectures using separate optical wavelengths to carry targeted services features standard itu grid wavelengths advanced analog chip design reduced equipment requirements in the hub oc-48 pin out telcordia technologies? 468 compliant wide temperature range ? stable even in harsh environments rohs compliant the 1754c laser module is a dense wavelength divi sion multiplexing (dwdm) laser for analog catv applications. it features a distributed-feedback (dfb ) device that has been designed specifically for radio frequency (rf) and catv applications. the 1754c 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 s hort and long lengths of fiber. the laser?s excellent inherent linearity minimizes degradation of the br oadcast signals caused by quadrature amplitude modulated (qam) channels. the 1754c is available in all c-band itu grid wavelengths. performance highlights min typical max units available wavelengths see page 3 nm operating temperature range -40 25 +85 ? c optical output power 6 - 16 - - mw adiabatic chirp (measured at 500 mhz) 40 - 100 mhz/ma composite second-order distortion (cso) - - -55 dbc composite triple beat distortion (ctb) - - -64 dbc carrier-to-noise ratio (cnr) 52 - - db frequency range 5 - 2700 mhz rf return loss 16 - - db noise and distortion performance above assume 79 channel ntsc loading with no qam, 0 dbm received optical power. see following pages for comp lete specifications and operating/test conditions. 1754c c-band dwdm dfb laser module
datasheet | december 2013 fiber optics | rev 2013.12 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 cause permanent damage to the device. these are absolute stress ratings only. functional operation of the device is not implied at these or any other c onditions in excess of those giv en in the operational sections of the data sheet. exposure to absolute maximum ratings for extended periods can adversely affect device reliability. parameter symbol condition min max unit operating temperature range t c continuous -40 +85 c storage temperature range t stg continuous -40 +85 c average rf input power - 60 seconds - 62 dbmv laser forward dc current - continuous - 150 ma photodiode reverse voltage v mpd continuous - 10 v laser reverse voltage, dc - continuous - 1 v esd - hbm: r = 1500 ohm, c = 100pf -500 500 v tec current i tec continuous -1.5 1.5 a electrical/optical characteristics laser temperature (tl) = 25 o c, i f =i op , beginning of life (bol) parameter symbol condition min typ max unit operating case temperature t c - -40 25 +85 ? c optical output power p o 6 mw version* 8 mw version* 10 mw version 16 mw version 6 8 10 16 - - - - 7.9 9.9 15.9 19.9 mw threshold current i th 25 ? c, bol - - 20 ma slope efficiency ? .07 - - w/a operating current i op bol - - 120 ma operating voltage v op 25 ? c, bol - - 2.5 v wavelength ?? itu grid see page 3 nm ? drift over t c range ?? op i f = 60 ma, t = t op - - 40 pm laser adiabatic chirp fm i f = 60 ma, t op = 25 ? c @ 500 mhz 40 - 100 mhz/ma optical return loss orl - 40 - - db sidemode suppression ratio smsr 30 - - db optical isolation iso 25 ? c 30 - - db relative intensity noise rin i f = i th + 70 ma - -155 db/hz ? nominal input impedance z in - 22 25 27 ?? mpd responsivity r pd v rm = 5 v 10 - 200 a/mw mpd dark current i d i op = 0 ma v rm = 5v, t op = 25 ? c 0.2 ? a mpd current relative to output power - v rm = 5v, t op = 25 ? c 10 - 200 ma/w thermistor resistance r th t op = 25 ? c 9.5 10 10.5 k ? thermistor temp. coefficient tc th t op = 25 ? c - -4.4 - % / ? c tec voltage v tec - -2.5 - 3.8 v *for 6 and 8 mw option, lossy splice may be applied. 1754c c-band dwdm dfb laser module
datasheet | december 2013 fiber optics | rev 2013.12 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 laser temperature (tl) = 25 o c, i f =i op , beginning of life (bol) parameter symbol condition min typ max units carrier-to-noise ratio (1) cnr 79 ntsc, 3.3% omi 1 m fiber min, 4.2 mhz nbw 52 - - db composite second-order (1) cso 79 ntsc, 3.3% omi 1 m fiber min -55 dbm composite triple beat (1) ctb 79 ntsc, 3.3% omi 1 m fiber min - -64 dbc frequency response flatness |s21| 40 mhz to 890 mhz i f = 60 ma, t op = 25 ? c - - 1 db p-p 5 mhz to 2700 mhz i f = 60 ma, t op = 25 ? c 4 db p-p rf return loss resistive match 50 ? to 25 ? pad |s11| 5 mhz to 2700 mhz i f = 60 ma, t op = 25 ? c 16 - - db carrier-to-noise ratio (2) cnr channel loading: frequencies set at 7, 13, 19, 25, 31, and 37 mhz receiver thermal noise 8 pa*hz -0.5 photodiode responsivity ~1.1 a/w noise bandwidth 4.2 mhz 51 - - db composite second-order (2) cso - - -50 dbm composite triple beat (2) ctb - - -60 dbc (1). broadband forward path (2). return path. guaranteed by design, not to test in production. in order to prevent reflection-induced dist ortion, the laser must be connected to an optical cable having a return loss of at l east 55 db for discrete reflections and 30 db for distributed reflections. itu grid channel numbering channel wavelength (nm) channel wavelength (nm) channel wavelength (nm) 64 1526.44 47 1539.77 30 1553.33 63 1529.22 46 1540.56 29 1554.13 62 1527.99 45 1541.35 28 1554.94 61 1528.77 44 1542.14 27 1555.75 60 1529.55 43 1542.94 26 1556.56 59 1530.33 42 1543.73 25 1557.36 58 1531.12 41 1544.53 24 1558.17 57 1531.90 40 1545.32 23 1558.98 56 1532.68 39 1546.12 22 1559.79 55 1533.47 38 1546.92 21 1560.61 54 1534.25 37 1547.72 20 1561.42 53 1535.04 36 1548.51 19 1562.23 52 1535.82 35 1549.32 18 1563.05 51 1536.61 34 1550.12 50 1537.40 33 1550.92 49 1538.19 32 1551.72 48 1538.98 31 1552.52 1754c c-band dwdm dfb laser module
datasheet | december 2013 fiber optics | rev 2013.12 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. electrical schematics 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 figure 2. 1754c circuit schematic 1754c c-band dwdm dfb laser module figure 1. 1754c laser simplified schematic 1 2 3 4 5 6 7 8 9 10 11 12 13 14 isolator case gnd 10k 100 22 12nh rf choke 0.01uf mpd ld nc (+) tec (-)
datasheet | december 2013 fiber optics | rev 2013.12 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 diagram (dimensions are in inches and millimeters) fiber type: 0.9 mm o.d. jacketed single mode 9/125 mm (smf-28) fiber length: 130 cm + 10 cm, measured as shown below nominal pin lead length: 0.2 inch (from external package wall) 130 + 10 cm conn 130 + 10 cm conn 1754c c-band dwdm dfb laser module
datasheet | december 2013 fiber optics | rev 2013.12 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 0220309. all versions of this laser are class 1 laser produc t, 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. 1754c c-band 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 | december 2013 fiber optics | rev 2013.12 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 1754c ? ww - xx ? yy ? zz family name analog 1550 nm, dfb, laser itu channel wavelengths ww = 18: channel 18, 1563.05 nm ww = 19: channel 19, 1562.23 nm ?.. ww = 64: channel 64, 1526.44 nm catv channel plan xx = bb: broadband xx = rp: return path connectors yy = fc: fc/apc yy = sc: sc/apc 1754c c-band dwdm dfb laser module minimum optical power zz = 06: 6 mw zz = 08: 8 mw zz = 10: 10 mw zz = 16: 16 mw example 1754c-32-bb-sc-08 : 1754c, itu channel 32, 1551.72 nm, sc/apc connector, 8 mw minimum optical power.
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