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 3 3 - - t t e e c c 2 2 . . 3 3 5 5 m m m m m m 0 0 . . 8 8 m m w w ?light emitting diodes led23 - tec are designed for emitting at a spectral range around 235 0 nm. thermocooler and thermoresistor are mounted inside 9 mm package to - 5. heterostr uctures (hs) are grown on gasb substrates ?light emitting diodes led23 - tec are developed for using in optical gas sensors and medical diagnostics. such construction gives possibility for temperature stabilization of led parameters. lifetime is more then 1 0000 hours. ? related products: led23 can be used in optical pair with our photodiodes pd24 . our standard led driver provides power supply of led23 - tec in two recommended here regimes (quasi - cw and pulsed). parameters min typ max wavelength, m m 2.3 0 2 . 3 5 2 . 3 9 fwhm, m m 0.17 0.2 2 0.27 optical power, m w q uasi - cw @ 200 ma pulsed@2a 0.6 12 0 . 8 16 1 . 0 20 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 packag e to - 5 with thermocooler and thermistor 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 thermoresistor tec lead top side view thermoresistor thermoresistor led23 typical spectra at different temperatures 0 20 40 60 80 100 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 wavelength, nm intensity, a.u. t=14c t=24c t=53c led23 - 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=14c t=24c t=53c led23 - typical current - voltage characteristic -40 -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 led23 (without reflector) led23-pr (with reflector) package to - 5 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
|
