LED18

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)