nec's ingaasp mqw-dfb laser module in coaxial package for 2.5 gb/s, cwdm applications nx8508 series features ? internal optical isolator ? peak emission wavelength p = 1 470 to 1 610 nm (based on cwdm) ? optical output power p f = 2.0 mw ? operating case temperature range t c = -20 to +85 c ? side mode suppression ratio smsr = 40 db ? ingaas monitor pin-pd ? with sc-upc connector ? based on telcordia reliability nec's nx8508 series are 1 470 to 1 610 nm multiple quantum w ell (mqw) structured distributed feed-back (dfb) laser diode coaxial modules with an internal optical isolator. these devices are ideal for 2.5 gb/s cwdm application. description california eastern laboratories preliminary data sheet electro-optical characteristics (t c = -20 to +85 c, unless otherwise speci ed) pa rt number nx8508 series symbols parameter and conditions unit min. typ. max. p f optical output power from fiber, cw, t c = 25 c, i f = i th + 20 ma mw 2.0 v op operating voltage, cw, p f = 2.0 mw v 1.1 1.6 i th threshold current, t c = 25 cma1020 50 p th threshold output power, i f = i th w 100 d differential ef ciency p f = 2.0 mw, t c = 25 cw/a0. 07 0.1 p f = 2.0 mw 0.04 d t emperature dependence of differential ef ciency d = 10 log d (@ t c c) d (@ 25 c) db ? 3.0 ? 1.6 p peak emission wavelength, cw, p f = 2.0 mw, t c = 25 cnm p ? 2 p *1 p +2 / tt emperature dependence of peak emission wavelength, cw nm/ c0 .08 0.10 0.12 smsr side mode suppression ratio, p f = 2.0 mw db 30 40 t r rise time, 20-80%, p f = 2.0 mw ps 100 continued on next page
nx8508 series electro-optical characteristics (t c = -25 to +85 c, unless otherwise speci ed) p art number nx8508 series symbols parameter and conditions unit min. typ. max. t f fall time, 80-20%, p f = 2.0 mw ps 150 i m monitor current, v r = 1.5 v, p f = 1.0 mw a 100 500 1 000 i d monitor dark current v r = 1.5 v, t c = 25 cna 0.1 10 v r = 1.5 v 10 100 tr acking error *2 , i m = const. db ? 1.0 1.0 *1 a vailable available for cwdm wavelengths based on itu-t recommendations p = 1 470, 1 490, 1 510, 1 530, 1 550, 1 570, 1 590, 1 610 nm please refer to t able a . t able a: cwdm wavelength code (@ t c = 25 c) wa velength code min. (nm) typ. (nm) max. (nm) 47 1 468 1 470 1 472 49 1 488 1 490 1 492 51 1 508 1 510 1 512 53 1 528 1 530 1 532 55 1 548 1 550 1 552 57 1 568 1 570 1 572 59 1 588 1 590 1 592 61 1 608 1 610 1 612 *2 t racking error: 0 i m i m t c = 25? t c = -20 to +85? p f (mw) p f 2.0 (ma) = 10 log [db] p f 2.0
nx8508 series symbol parameter unit ratings p f optical output power from fiber mw 5 i f forward current of ld ma 150 v r reverse voltage of ld v 2.0 i f forward current of pd ma 2.0 v r reverse voltage of pd v 15 t c operating case t emperature c -20 to +85 t stg storage temperature c ? 40 to +85 absolute maximum ratings 1 nx8508bmxx *1 -cc 7.0?.2 8.0?.3 2.2 3.2 20.4?.0 27.6?.0 2.2 20.0?.0 1.2?.2 6.0 12.7?.2 17.0?.2 0.9 4.0?.2 0.45?.05 optical fiber (smf) with sc connector nx8508cgxx *1 -cc 7.0?.2 8.0?.3 15.0 7.3 28.3?.0 19.5?.0 6.0 16.0 0.9 0.45?.05 0.5?.2 0.5 optical fiber (smf) with sc connector pin connections 4 1 3 2 pd ld case p. c . d. = 2.0 8.5?.2 4 r1.25?.2 12.0?.15 7.0?.2 1 2 3 4 2 ? 2.5 pin connections 4 1 3 2 pd ld case p. c . d. = 2.0 1.0?.1 7.2?.3 3.7?.3 1 2 3 4 *1 please refer to ordering information . p ackage dimensions (units in mm)
nx8508 series p arameter specification unit mode field diameter 9.5 1 m cladding diameter 125 2 m maximum cladding noncircularity 2% maximum core/cladding concentricity 1.6 % outer diameter 0.9 0.1 mm cut-off wavelength 1 100 to 1 270 nm minimum fiber bending radius 30 mm fiber length 1 000 100 mm flammability ul1581 vw-1 optical fiber characteristics life support applications these nec products are not intended for use in life support devices, appliances, or systems where the malfunction of these prod ucts can reasonably be expected to result in personal injury. the customers of cel using or selling these products for use in such applications do so at their own risk and agree to fully indemnify cel for all damages resulting from such improper use or sale. a business partner of nec compound semiconductor devices, ltd. 05/03/2004 sc-upc connector fiber length: 1 000?00 mm 35? mm 8.99?.5 mm p art number flange type available connector nx8508bmxx-cc flat mount flange with sc-upc connector nx8508cgxx-cc vertical mount flange ordering information connector code : with sc-upc connector wavelength code : refer to table a package code : refer to package dimensions nx8508 xx-cc
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