LIGHT EMITTING DIODES

1.6

÷÷4.6

M

C

3

4

4

W

•Light Emitting Diodes LED34-TEC are designed for emitting at a spectral range

around 3400 nm. Thermocooler and thermoresistor are mounted inside 9 mm

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

•Light Emitting Diodes LED34-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: LED34 can be used in optical pair with our photodiodes

PD36. Our standard LED Driver provides power supply of LED34-TEC in two

recommended here regimes (Quasi-CW and Pulsed).

Parameters

Min

Typ

Max

Wavelength,

µm

3.30

3.40

3.50

FWHM,

µm

0.60

0.70

0.80

Optical Power,

µW

Quasi-CW @ 200 mA

Pulsed@2A

20

320

24

400

28

480

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

LED34 typical spectra at different temperatures

0

5

10

15

20

25

30

35

40

45

2500 2700 2900 3100 3300 3500 3700 3900 4100 4300 4500

Wavelength, nm

T=4°C

T=21°C

T=47°C

LED34 - typical power vs. current

characteristic at different

temperatures

0

4

8

12

16

20

24

28

32

0

50

100

150

200

Current, mA

T=4°C

T=21°C

T=47°C

c

LED34 - typical Current-voltage

characteristic

-40

-30

-20

-10

0

10

20

30

40

-1

-0,8 -0,6 -0,4 -0,2

0

0,2 0,4

Voltage, V

Far field pattern

with and without reflector

LED34 (without reflector)

LED34-PR (with reflector)

Package TO-5

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

0

10

20

30

40

50

-20

0

20

40

60

Temperature, C