LIGHT EMITTING DIODES

1.6

÷÷4.6

M

C

2

5

W

•Light Emitting Diodes LED20-TEC are designed for emitting at a spectral range

around 2050 nm. Thermocooler and thermoresistor are mounted inside 9 mm

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

•Light Emitting Diodes LED20-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: LED20 can be used in optical pair with our photodiodes

PD24. Our standard LED Driver provides power supply of LED20-TEC in two

recommended here regimes (Quasi-CW and Pulsed).

Parameters

Min

Typ

Max

Wavelength,

µm

2.00

2.05

2.09

FWHM,

µm

0.15

0.20

0.25

Optical Power,

µW

Quasi-CW @ 200 mA

Pulsed@2A

0.9

25

1.1

28

1.3

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)

∆T

max

(Amps) (Watts) (Volts)

°C

0.7

0.4

1.0

67

LED chip

Thermoresistor

TEC

LEAD

TOP SIDE VIEW

Thermoresistor

Thermoresistor

LED20 typical spectra at different temperatures

0

50

100

150

200

250

300

350

1600

1700

1800

1900

2000

2100

2200

2300

2400

Wavelength, nm

T=11°C

T=33°C

T=55°C

LED20 - typical power vs. current

characteristic at different 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=11°C

T=33°C

T=55°C

LED20 - typical Current-voltage

characteristic

-30

-20

-10

0

10

20

30

40

-4

-3

-2

-1

0

1

2

Voltage,V

Far field pattern

with and without reflector

0

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0,9

1

LED20 (without reflector)

LED20-PR (with reflector)

Package TO-5

0

10

20

30

40

50

-20

0

20

40

60

Temperature, C

Recommended regimes of

LED operation

Quasi-CW

200 mA

250

µs

1

µs

2 A

500

µs

f=2 kHz

f=2 kHz

Pulsed

250

µs