description the alcatel 1935 lmi contains an alcatel slmqw dfb laser and is designed for use with external modulation. this module is designed to high power dwdm applications with a spacing between the channels down to 50 ghz without using external locker. the module integrates a wavelength monitoring function in order to allow wavelength stabilization over product lifetime. despite of this new feature, the package and the pinout of the new product stays compatible with the previous series (alcatel 1905lmi) without the integrated wavelength monitoring function, in order to avoid a complete redesign of existing boards. the choice of an analog output for the control signal will leave the freedom for the user to lock the wavelength either with a digital or an analog circuit. the module incorporates also a polarization maintaining fiber pigtail, thermoelectric cooler, precision thermistor, and optical isolator for stable operation under all conditions. features ? integrated fabry-perot etalon wavelength monitoring (replaces external lockers) ? up to 20mw output power ? 50 ghz channels spacing available ? high reliability ingaasp buried ridge structure laser chip with outstanding long term wavelength stability ? optimized for use with linbo3 external modulator ? internal optical isolator ? internal tec and power monitoring photodiode ? polarization maintaining fiber pmf pigtail applications ? ultra long haul dwdm sonet/sdh transmission system ? dwdm submarine terminal ? instrumentation a lcatel 1935 lmi high power cw laser c and l bands w ith integrated wavelength monitoring
electro-optic characteristics parameter symb. conditions min max units threshold current i th 40 ma optical output power p f twave= 15 to 35c 10 mw 20 mw laser forward voltage v f @ p f ; cw; pin 11 & 3 - 2.5 v laser forward current (bol) i f @ p f =10mw; pin 11 & 3 120 ma @ p f =20mw; pin 11 & 3 190 ma laser chip temp. range for wavelength tunability twave (2) 15 35 c spectral width ? @ 10 mw; cw; fwhm 10 mhz @ 20 mw; cw; fwhm 5 mhz side mode suppression smsr @ p f ; cw 35 db tec current i t (1), eol 1.3 a tec voltage v t (1), eol 2.5 v thermistor resistance r th @ ts = 25c 9.7 10.3 k ? thermistor temperature coefficient r t -3 -5 %/k relative intensity noise rin 100 mhz to 10 ghz @ p f -140 db/hz te/tm fiber extinction ratio er 20 db note : all limits start of life (except it, vt), tsubmount=25c, tcase=25c, pf, v=-5v (1) tcase=70c (for 10&20mw), tsubmount=20c, @1.2 p f (2) twave is chip temperature required to meet target wavelength wavelength monitoring section two photodiodes are used to ensure both optical power monitoring and wavelength monitoring. the first one (power monitoring) is referenced as monitoring photodiode (pd mon ) whereas the second one (wavelength monitoring) is referenced as filter photodiode (pd filt ). symb. min max unit power monitoring photodiode current i pdmon 20 a filter monitoring photodiode current i pdfilt 20 a photodiodes dark current i dark 0.1 a center wavelength c itu grid wavelength stability over lifetime ? c - 2.5 +2.5 ghz wavelength capture range cr 45 ghz wavelength deviation between adjacent itu channels 0.1 ghz filter slope (normalized to maximum pd filt current) fs 2 nm -1 electrical responsivity ratio between power monitoring channel and filter monitoring channel ert 6 db
absolute maximum ratings exposing the device to stresses above those listed in absolute maximum rating could cause permanent damage. exposure to absolute maximum rating conditions for extended periods may affect device reliability. environmental parameter min max unit storage temperature - 40 85 c operating temperature (for 10mw to 20mw versions) -10 70 c soldering temperature (10 seconds maximum) 260 c axial force on fiber ( 10 seconds max.) 5 n fiber bend radius 30 mm esd (1) applied on pin detector (pin 4&5) 100 v esd (1) on other pin 2000 v (1) human body model electro-optic parameter min max unit laser forward current 400 ma laser reverse voltage 2 v photodiode forward current 1 ma photodiode reverse voltage 20 v thermistor voltage 9 v thermistor current 250 a tec voltage 2.8 v tec current 1.4 a packing mounting torque 0.2 nm
all dimensions in mm 5.95 6 12.7 min 26 30 2 1.25 15.2 12.7 9 1.85 6x2.54 14x ( 0.5x0.20.06 ) 17.84 1.48 9.8 5.6 ?5.3 maxi 20.8 ?5.6 1.78 rigid 31,5 ?0.9 optical fiber length 0.8 m i 2x 2.7 35 min keyed fc/pc connector pin allocation pin description 1thermistor 2thermistor 3 ld dc bias (-) 4 power monitoring pd anode (-) 5 common power monitoring and monitoring pd cathode (+) 6 te cooler (+) 7 te cooler (-) 8 case ground 9 case ground 10 monitoring pd anode 11 rf common (+) 12 laser rf input (-) 13 rf common (+) 14 no connect pin#1 is the top-rigth one on the laser module top view
ordering information alcatel 1935 lmi nominal power connector type part number [1] 10 mw 20 mw fc/pc fc/pc 3cn 00412 ##aa 3cn 00413 ##aa ## defines the wavelength and the connector according to the following table . thz connector fc/pc thz connector fc/pc 1528,77 196,10 bm 1542,94 194,30 cz 1529,16 196,05 bn 1543,33 194,25 da 1529,55 196,00 bp 1543,73 194,20 db 1529,94 195,95 bq 1544,13 194,15 dc 1530,33 195,90 br 1544,53 194,10 dd 1530,72 195,85 bs 1544,92 194,05 de 1531,12 195,80 bt 1545,32 194,00 df 1531,51 195,75 bu 1545,72 193,95 dg 1531,90 195,70 bv 1546,12 193,90 dh 1532,29 195,65 bw 1546,52 193,85 dj 1532,68 195,60 bx 1546,92 193,80 dk 1533,07 195,55 by 1547,32 193,75 dl 1533,47 195,50 bz 1547,72 193,70 dm 1533,86 195,45 ca 1548,11 193,65 dn 1534,25 195,40 cb 1548,51 193,60 dp 1534,64 195,35 cc 1548,91 193,55 dq 1535,04 195,30 cd 1549,32 193,50 dr 1535,43 195,25 ce 1549,72 193,45 ds 1535,82 195,20 cf 1550,12 193,40 dt 1536,22 195,15 cg 1550,52 193,35 du 1536,61 195,10 ch 1550,92 193,30 dv 1537,00 195,05 cj 1551,32 193,25 dw 1537,40 195,00 ck 1551,72 193,20 dx 1537,79 194,95 cl 1552,12 193,15 dy 1538,19 194,90 cm 1552,52 193,10 dz 1538,58 194,85 cn 1552,93 193,05 ea 1538,98 194,80 cp 1553,33 193,00 eb 1539,37 194,75 cq 1553,73 192,95 ec 1539,77 194,70 cr 1554,12 192,90 ed 1540,16 194,65 cs 1554,54 192,85 ee 1540,56 194,60 ct 1554,94 192,80 ef 1540,95 194,55 cu 1555,34 192,75 eg 1541,35 194,50 cv 1555,75 192,70 eh 1541,75 194,45 cw 1556,15 192,65 ej 1542,14 194,40 cx 1556,55 192,60 ek 1542,54 194,35 cy 1556,96 192,55 el
thz connector fc/pc 1557,36 192,50 em 1557,77 192,45 en 1558,17 192,40 ep 1558,58 192,35 eq 1558,98 192,30 er 1559,39 192,25 es 1559,79 192,20 et 1560,20 192,15 eu 1560,61 192,10 ev 1561,01 192,05 ew 1561,42 192,00 ex 1561,83 191,95 ey 1562,23 191,90 ez 1562,64 191,85 fa 1563,05 191,80 fb 1563,45 191,75 fc 1563,86 191,70 fd 1564,27 191,65 fe 1564,68 191,60 ff 1565,08 191,55 fg 1565,49 191,50 fh 1565,90 191,45 fj 1566,31 191,40 fk 1566,72 191,35 fl 1567,13 191,30 fm 1567,54 191,25 fn 1567,95 191,20 fp 1568,36 191,15 fr 1568,77 191,10 fs 1569,18 191,05 ft 1569,59 191,00 fu table 1, all wavelengths referenced to vaccum standards itu-t g.652 optical fiber iec 68-2 and mil std 883 environment laser radiation avoid exposure to beam class 3 b laser product attention observe precautions for handling electrostatic discharge sensitive devices september 2001 copyright ? 2000 alcatel optronics customized versions are available for large quantities. performance figures contained in this document must be specifically confirmed in writing by alcatel optronics before they become applicable to any particular order or contract. alcatel optronics reserves the right to make changes to the products or information contained herein without notice. a printed version of this document is an uncontrolled copy. europe route de villejust f-91625 nozay cedex tel : (+33) 1 64 49 49 10 fax : (+33) 1 64 49 49 61 usa 15036, conference centre drive chantilly ? va 20151 tel : (+1) 703 679 3600 fax : (+1) 703 679 6667 canada 45, de villebois, suite 200 gatineau (pq) canada, j8t 8j7 tel : (+1) 819 243 3755 fax : (+1) 819 243 3354 japan dai-tokyo kasai shinjuku building 13f 3-25-3, yoyogi, shibuya-ku tokyo 151 ? 0053 ? japan tel : (+81) 3 5302 4341 fax : (+81) 3 5302 433
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