LIGHT EMITTING DIODES 1.6÷ ÷4.6 µm 3 .4 µ m Model LED34-TEC 24 µW •Light Emitting Diodes LED34-TEC are designed for emitting at a spectral range around 3400 nm. Thermocooler and thermoresistor are mounted inside 9 mm package TO-5. Heterostructures (HS) are grown on InAs substrates •Light Emitting Diodes LED34-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 10000 hours. •Related products: LED34 can be used in optical pair with our photodiodes PD36. Our standard LED Driver provides power supply of LED34-TEC in two recommended here regimes (Quasi-CW and Pulsed). Recommended regimes of LED operation Parameters Min Typ Wavelength, µm FWHM, µm 3.30 0.60 3.40 0.70 3.50 0.80 20 320 10 24 400 30 28 480 50 Optical Power, µW Quasi-CW @ 200 mA Pulsed@2A Max Quasi-CW f=2 kHz Main thermocooler parameters (without load) Imax Qmax Umax (Amps) (Watts) (Volts) 0.7 0.4 1.0 Switching Time, ns Range of temperature control oC Emitting Area, µm Soldering temperature -10÷+60 300x300 250 µs Pulsed 250 µs 1 µs f=2 kHz 2A 500 µs 95 oC 50 40 30 20 10 0 TO-5 with thermocooler and thermistor Package Thermoresistance, kOhm 200 mA ∆Tmax °C 67 -20 0 20 40 Temperature, C 60 Package TO-5 LED34 typical spectra at different temperatures LED chip 45 Thermoresistor 40 TEC LEAD TOP SIDE VIEW Intensity, a.u. 35 30 T=4°C 25 T=21°C 20 T=47°C 15 10 Thermoresistor 5 0 2500 2700 2900 3100 3300 3500 3700 3900 4100 4300 4500 Wavelength, nm Thermoresistor LED34 - typical Current-voltage characteristic 32 40 28 30 24 20 20 16 12 c T=4°C 8 T=21°C 4 T=47°C 0 0 50 100 Current, mA 150 200 Current, mA Power, µW LED34 - typical power vs. current characteristic at different temperatures Far field pattern with and without reflector 10 0 -1 -0,8 -0,6 -0,4 -0,2 -10 0 -20 0,2 0,4 LED34 (without reflector) -30 -40 Voltage, V LED34-PR (with reflector)