÷÷4.6

M

R

3

8

6

W

•Light Emitting Diodes LED38-PR are designed for emitting at a spectral

range around 3800 nm. Heterostructures (HS) are grown on InAs

substrates. The output emission can be modulated by current flowing in

a forward direction.

•Light Emitting Diodes LED38-PR are developed for using in optical gas

sensors and medical diagnostics. They have stable output power and

lifetime more then 10000 hours.

•Related products: Our standard LED Driver provides power supply of

LED38-PR in two recommended here regimes (Quasi-CW and Pulsed).

Parameters

Min

Typ

Max

Wavelength,

µm

3.70

3.80

3.90

FWHM,

µm

0.60

0.70

0.80

Optical Power,

µW

Quasi-CW @ 200 mA

Pulsed@1A

12

180

16

200

20

220

Switching Time, ns

10

30

50

Operating Temperature

Range,

-240

÷+50

Emitting Area,

µm

300x300

Soldering temperature

260

Package

TO-18 with Parabolic Reflector

LED38 typical spectra at different temperatures

0

5

10

15

20

2700 2900 3100 3300 3500 3700 3900 4100 4300 4500 4700

Wavelength, nm

T=6°C

T=21°C

T=50°C

LED38 - typical power vs. current

characteristic at different

temperatures

0

4

8

12

16

20

0

50

100

150

200

Current, mA

T=6°C

T=21°C

T=50°C

LED38 - typical Current-voltage

characteristic

-40

-30

-20

-10

0

10

20

30

40

-2

-1,5

-1

-0,5

0

0,5

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

LED38 (without reflector)

LED38-PR (with reflector)

Package TO-18 with Reflector

Recommended regimes of operation

Quasi-CW

200 mA

250

µs

250

µs

1

µs

2 A

500

µs

f=2 kHz

f=2 kHz

Pulse