LIGHT EMITTING DIODES 1.6÷ ÷4.6 µm 1.85 µm 0.9 mW Model LED18 •Light Emitting Diodes LED18 are designed for emitting at a spectral range around 1850 nm. Heterostructures (HS) are grown on GaSb substrates. The output emission can be modulated by current flowing in a forward direction. •Light Emitting Diodes LED18 are developed for using in optical gas sensors and medical diagnostics. They have stable output power and lifetime 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 in two recommended here regimes (Quasi-CW and Pulsed). Parameters Min Typ Max Wavelength, µm 1.80 1.85 1.89 FWHM, µm 0.15 0.20 0.25 Optical Power, mW Quasi-CW @ 200 mA 0.7 0.9 1.1 Pulsed@1A 15 20 25 Switching Time, ns 10 30 50 Operating Temperature Range, oC -240÷+50 Emitting Area, µm 300x300 Recommended regimes of operation f=2 kHz Quasi-CW 200 mA 250 µs 250 µs 1 µs Pulse f=2 kHz 2A Soldering temperature 260 oC Package TO-18 500 µs 70 LED18 typical spectra at different temperatures 60 Intensity, a.u. T=10C 50 40 T=20C 30 20 10 T=65C 0 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 W avelength, nm LED18 - typical power vs. current characteristic Far field pattern with and without reflector LED18 - typical Current-voltage characteristic 40 1,0 1 0,9 30 0,9 0,8 0,7 0,7 20 Current, mA Power, mW 0,8 0,6 0,5 0,4 0,3 0,6 0,5 0,4 10 0,3 0,2 0,1 0 -5 -4 -3 -2 0,2 0,1 -1 0 -10 0 1 LED18 (without reflector) -20 0,0 0 50 100 Current, mA 150 -30 200 Voltage,V LED18-PR (with reflector)