LIGHT EMITTING DIODES

1.6

÷÷4.6

M

C

3

1

4

W

•Light Emitting Diodes LED31-TEC are designed for emitting at a spectral range

around 3100 nm. Thermocooler and thermoresistor are mounted inside 9 mm

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

•Light Emitting Diodes LED31-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: LED31 can be used in optical pair with our photodiodes

PD36. Our standard LED Driver provides power supply of LED31-TEC in two

recommended here regimes (Quasi-CW and Pulsed).

Parameters

Min

Typ

Max

Wavelength,

µm

3.00

3.10

3.20

FWHM,

µm

0.60

0.70

0.80

Optical Power,

µW

Quasi-CW @ 200 mA

Pulsed@2A

12

180

14

200

16

220

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

LED31 typical spectra at different temperatures

0

3

6

9

12

15

2000

2400

2800

3200

3600

4000

4400

Wavelength, nm

T=51°C

T=6°C

T=20°C

LED31 - typical power vs. current

characteristic at different temperatures

0

4

8

12

16

20

24

0

50

100

150

200

Current, mA

T=51°C

T=6°C

T=20°C

LED31 - typical Current -

Voltage characteristic

-40

-30

-20

-10

0

10

20

30

40

-4

-2

0

2

Voltage,V

Far field pattern

with and without reflector

LED31 (without reflector)

LED31-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