LED19
TECHNICAL DATA
Mid-Infrared Light Emitting Diode
Light Emitting Diodes with central wavelength 1.95 µm series are based on heterostructures grown
on GaSb substrates by LPE. Solid solutions GaInAsSb are used in the active layer. Wide band gap
solid solutions AlGaAsSb with Al content 64% are used for good electron confinement.
LED19 has a stable ouput power and a lifetime more then 80000 hours.
Specifications
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Structure:
Peak Wavelength:
Optical Output Power:
Package:
GaInAsSb/AlGaAsSb
typ. 1.95 µm
typ. 1 mW qCW
TO-18
with cap and window
Absolute Maximum Ratings (T
A
=25°C)
Item
Peak Wavelength
FWHM
Quasi-CW
Optical Power
Pulsed
Optical Power
Switching Time
Operation Voltage
Operating
Temperature
Emitting Area
Soldering
Temperature
Package
Condition
T=300 K
150 mA qCW
200 mA qCW
1 A, f=1 kHz,
duty cycle
0.1%
T=300 K
200 mA qCW
Min.
1.90
100
0.8
20
10
0.5
-200 … +50
300 x 300
180
Value
Typ.
1.95
150
1.0
25
20
-
Max.
1.99
200
1.2
30
30
1.5
Unit
µm
nm
mW
mW
ns
V
°C
µm
°C
TO-18, with non-removeable cap and window
(Unit: mm)
Operation Instructions
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LED basic circuit connection
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We recommend to use one of our drivers
and evaluation boards designed for those
Mid-IR LEDs
D-11, D-31, D-31M
DLT-27, DLT-37
mD-1c, mD-1p
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We recommend to use
Quasi Continuous Wave (qCW) mode
with duty cycle 50% or 25% to obtain
maximum average optical power and short
Pulse mode
to obtain maximum peak power.
Hard CW (continues wave) mode is NOT recommended.
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Quasi CW Mode
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Pulsed Mode
Typical Performance Curves
Spectra – Operation Currents
(qCW, T=300 K)
Spectra – Temperature
(qCW, I=150 mA)
Output Power – Forward Current
(qCW, T=300 K)
Forward Current – Forward Voltage
(qCW, T=300 K)
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Beam Divergence (Far-Field Pattern)
Note:
The above specifications are for reference purpose only and subjected to change without prior notice.
Precaution for Use
1. Cautions
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Check your connection circuits before turning on the LED.
Observe the LED polarity: LED anode is marked with a RED dot.
DO NOT
connect the LED to the multimeter!
2. Soldering Conditions
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DO NOT apply any stress to the lead particularly when heat.
After soldering the LEDs should be protected from mechanical shock or vibration until the LEDs return
to room temperature.
When it is necessary to clamp the LEDs to prevent soldering failure, it is important to minimize the
mechanical stress on the LEDs.
3. Static Electricity
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The LEDs are very sensitive to Static Electricity and surge
voltage. So it is recommended that a wrist band and/or an anti-
electrostatic glove be used when handling the LEDs.
All devices, equipment and machinery must be grounded properly.
It is recommended that precautions should be taken against surge
voltage to the equipment that mounts the LEDs.
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4. Heat Generation
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Thermal design of the end product is of paramount importance. Please consider the heat generation of
the LED when making the system design. The coefficient of temperature increase per input electric
power is affected by the thermal resistance of the circuit board and density of LED placement on the
board, as well as other components. It is necessary to avoid intense heat generation and operate
within the maximum ratings given in the specification.
The operating current should be decided after considering the ambient maximum temperature of
LEDs.
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