light emitting diodes 1.6 ? ? 4.6 m m m m m o o d d e e l l l l e e d d 1 1 8 8 - - t t e e c c - - p p r r 1 1 . . 8 8 5 5 m m m m m m 0 0 . . 9 9 m m w w ?light emitting diodes led18 - tec - pr are designed for emitting at a spectral range around 18 50 nm. thermocooler and thermoresistor are mounted inside 9 mm package to - 5. he terostructures (hs) are grown on gasb substrates ?light emitting diodes led18 - tec - pr are developed for using in optical gas sensors and medical diagnostics. such construction gives possibility for temperature stabilization of led parameters. lifetime is m ore then 10000 hours. ? related products: led18 can be used in optical pair with our photodiodes pd24 . our standard led driver provides power supply of led18 - tec - pr in two recommended here regimes (quasi - cw and pulsed). parameters min typ max wavele ngth, m m 1 . 80 1.85 1.89 fwhm, m m 0.15 0.20 0.25 optical power, m w q uasi - cw @ 200 ma pulsed@2a 0.7 15 0 . 9 20 1 . 1 25 switching time, ns 10 30 50 range of t emperature control o c - 10 ? +60 emitting area, m m 300x300 soldering temperature 95 o c package to - 5 with thermocooler , t hermistor and parabolic reflector main thermocooler parameters (without load) i max q max u max d t max (amps) (watts) (volts) c 0.7 0.4 1.0 67 led chip tec lead thermoresistor top side view thermoresistor thermoresistor led18 typical spectra at different temperatures 0 10 20 30 40 50 60 70 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 wavelength, nm intensity, a.u. t=10c t=20c t=65c led18 - typical power vs. current characteristic at different temperatures 0,0 0,2 0,4 0,6 0,8 1,0 1,2 0 50 100 150 200 current, ma power, mw t=10c t=20c t=65c led18 - typical current-voltage characteristic -30 -20 -10 0 10 20 30 40 -5 -4 -3 -2 -1 0 1 voltage,v current, ma far field pattern with and without reflector 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 led18 (without reflector) led18-pr (with reflector) recommended regimes of led operation quasi - cw 20 0 ma 250 m s 1 m s 2 a 500 m s f=2 khz f=2 khz pulsed 250 m s 0 10 20 30 40 50 -20 0 20 40 60 temperature, c thermoresistance, kohm package to - 5 wit h parabolic reflector
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