LIGHT EMITTING DIODES

1.6

÷÷4.6

M

C

1

5

W

•Light Emitting Diodes LED19-TEC are designed for emitting at a spectral range

around 1950 nm. Thermocooler and thermoresistor are mounted inside 9 mm

package TO-5. Heterostructures (HS) are grown on GaSb substrates

•Light Emitting Diodes LED19-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: LED19 can be used in optical pair with our photodiodes

PD24. Our standard LED Driver provides power supply of LED19-TEC in two

recommended here regimes (Quasi-CW and Pulsed).

Parameters

Min

Typ

Max

Wavelength,

µm

1.90

1.95

1.99

FWHM,

µm

0.15

0.20

0.25

Optical Power,

µW

Quasi-CW @ 200 mA

Pulsed@2A

0.8

20

1.0

25

1.2

30

Switching Time, ns

10

30

50

Range of temperature

control

-10

÷+60

Emitting Area,

µm

300x300

Soldering

temperature

95

Package

TO-5 with thermocooler

and thermistor

Main thermocooler parameters (without load)

0

10

20

30

40

50

-20

0

20

40

60

Temperature, C

∆T

max

(Amps) (Watts) (Volts)

°C

0.7

0.4

1.0

67

LED chip

Thermoresistor

TEC

LEAD

TOP SIDE VIEW

Thermoresistor

Thermoresistor

LED19 typical spectra at different temperatures

0

20

40

60

80

100

120

1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500

Wavelength, nm

T=20°C

T=48°C

T=6°C

LED19 - ty pical power vs. current

characteristic at diff erent temperatures

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

0

50

100

150

200

Current, mA

T=20°C

T=48°C

T=6°C

LED19 - typical Current-voltage

characteristic

-30

-20

-10

0

10

20

30

40

-5

-4

-3

-2

-1

0

1

2

Voltage,V

Far field pattern

with and without reflector

LED19 (without reflector)

LED19-PR (with reflector)

Recommended regimes of

LED operation

Quasi-CW

200 mA

250

µs

250

µs

1

µs

2 A

500

µs

f=2 kHz

f=2 kHz

Pulsed

Package TO-5