LIGHT EMITTING DIODES 1.6÷ ÷4.6 µm 1.85 µm Model LED18-TEC-PR 0.9 mW •Light Emitting Diodes LED18-TEC-PR are designed for emitting at a spectral range around 1850 nm. Thermocooler and thermoresistor are mounted inside 9 mm package TO-5. Heterostructures (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 more 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). Wavelength, µm FWHM, µm Optical Power, µW Quasi-CW @ 200 mA Pulsed@2A Switching Time, ns Range of temperature control oC Emitting Area, µm Soldering temperature Package Min 1.80 0.15 Typ 1.85 0.20 Max 1.89 0.25 0.7 15 10 0.9 20 30 1.1 25 50 -10÷+60 300x300 Recommended regimes of LED operation Quasi-CW f=2 kHz 200 mA 250 µs 250 µs Pulsed 1 µs f=2 kHz 2A 95 oC 500 µs TO-5 with thermocooler, thermistor and Parabolic Reflector Main thermocooler parameters (without load) Imax Qmax Umax (Amps) (Watts) (Volts) 0.7 0.4 1.0 Thermoresistance, kOhm Parameters ∆Tmax °C 67 50 40 30 20 10 0 -20 0 20 40 Temperature, C 60 Package TO-5 with Parabolic Reflector LED18 typical spectra at different temperatures 70 Thermoresistor 60 Intensity, a.u. LED chip TEC LEAD TOP SIDE VIEW 50 T=10°C 40 T=20°C 30 T=65°C 20 Thermoresistor 10 0 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 Wavelength, nm Thermoresistor LED18 - typical Current-voltage characteristic 40 LED18 - typical power vs. current characteristic at different temperatures 1,2 1 T=10°C 30 0,9 0,8 T=20°C 0,8 0,7 Current, mA Power, mW 1,0 Far field pattern with and without reflector T=65°C 0,6 0,4 20 0,6 0,5 0,4 10 0,3 0,2 0,1 0 -5 -4 -3 -2 0,2 -1 0 -10 0 1 LED18 (without reflector) -20 0,0 0 50 100 150 Current, mA -30 200 Voltage,V LED18-PR (with reflector)