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 2 2 0 0 - - t t e e c c - - p p r r 2 2 . . 0 0 5 5 m m m m m m 1 1 . . 1 1 m m w w ?light emitting diodes led20 - tec - pr are designed for emitting at a spectral range around 20 50 nm. thermocooler and thermoresistor are mounted inside 9 mm package to - 5. hete rostructures (hs) are grown on gasb substrates ?light emitting diodes led20 - 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 mor e then 10000 hours. ? related products: led20 can be used in optical pair with our photodiodes pd24 . our standard led driver provides power supply of led20 - tec - pr in two recommended here regimes (quasi - cw and pulsed). parameters min typ max wavelengt h, m m 2.0 0 2 . 0 5 2 . 0 9 fwhm, m m 0.15 0.20 0.25 optical power, m w q uasi - cw @ 200 ma pulsed@2a 0.9 25 1 . 1 28 1 . 3 30 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 pac kage to - 5 with t hermocooler , 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 led20 typical spectra at different temperatures 0 50 100 150 200 250 300 350 1600 1700 1800 1900 2000 2100 2200 2300 2400 wavelength, nm intensity, a.u. t=11c t=33c t=55c led20 - typical power vs. current characteristic at different temperatures 0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 0 50 100 150 200 current, ma power, mw t=11c t=33c t=55c led20 - typical current-voltage characteristic -30 -20 -10 0 10 20 30 40 -4 -3 -2 -1 0 1 2 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 led20 (without reflector) led20-pr (with reflector) recommended regimes of led operation quasi - cw 200 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 with parabolic reflector led chip tec lead thermoresistor top side view thermoresistor thermoresistor
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