LIGHT EMITTING DIODES

1.6

÷÷4.6

M

R

2

5

W

•Light Emitting Diodes LED23-TEC-PR are designed for emitting at a spectral

range around 2350 nm. Thermocooler and thermoresistor are mounted inside 9

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

•Light Emitting Diodes LED23-TEC-PR 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: LED23 can be used in optical pair with our photodiodes

PD24. Our standard LED Driver provides power supply of LED23-TEC-PR in

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

Parameters

Min

Typ

Max

Wavelength,

µm

2.30

2.35

2.39

FWHM,

µm

0.17

0.22

0.27

Optical Power,

µW

Quasi-CW @ 200 mA

Pulsed@2A

0.6

12

0.8

16

1.0

20

Switching Time, ns

10

30

50

Range of temperature

control

-10

÷+60

Emitting Area,

µm

300x300

Soldering

temperature

95

Package

TO-5 with Thermocooler,

Thermistor and Parabolic

Reflector

Main thermocooler parameters (without load)

∆T

max

(Amps) (Watts) (Volts)

°C

0.7

0.4

1.0

67

LED chip

TEC

LEAD

Thermoresistor

TOP SIDE VIEW

Thermoresistor

Thermoresistor

LED23 typical spectra at different tem peratures

0

20

40

60

80

100

1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800

Wavelength, nm

T=14°C

T=24°C

T=53°C

LED23 - 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=14°C

T=24°C

T=53°C

LED23 - typical current - voltage

characteristic

-40

-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

LED23 (without reflector)

LED23-PR (with reflector)

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

Package TO-5 with Parabolic Reflector