Mid-Infrared (MIR) Light-Emitting Diode4.10 - 4.30 μm

Lms43LED series
Device parameters

Symbol

Value

Units

Operating/ storage temperature

Tstg-60..+90*°C

Soldering temperature(can be applied for not more than 5 secs)

Tsol+180°C*Temperature range may vary for different packaging types.
All parameters are for LED operation at 25°C unless otherwise stated, measured on TO18 header (without cap/reflector).

LED parameters
Peak emission wavelength1
1

FWHM of the emission bandConditions

Symbol

Value

Units

qCW mode3 I = 150 mA

λp

4.10 - 4.30µm3FWHM
Pqcw

400 - 1200nm

min 15 / typ 30µW

Pulse mode4 I = 1 A

Ppul

min 120 / typ 200µW

qCW mode3Imax qcw

250mA

4Pulse modeImax pulse

2A

qCW mode3 I = 200 mAV

0.2 - 0.8

V

qCW mode I = 150 mA

Average optical power (minimal / typical)

1

3

qCW mode I = 200 mA

Peak optical power (minimal / typical)2
Maximum operating current
Forward voltage1
3

3

Typical spectrum (qCW )50

40

originalwith atmospheric impact

30
20
100
3000

3500

4000

4500

5000

5°C
25°C
50°C

30Intensity, a.u.

40Intensity, a.u.

Spectra at different temperatures (qCW , 150 mA)

20
100
3000

5500

3500

4000

Typical spectra at different currents (qCW3)

5500

20
1025
20

Power, µW

Intensity, a.u.

30

15
1050

3500

4000

4500

5000

5500

050

100

150

200

250Current, mA

Wavelength, nm

Rev.200820

5000

Typical optical power characteristic (qCW3)

50mA
100mA
150mA
200mA

40

0
3000

4500

Wavelength, nm

Wavelength, nm

1Parameter tested for each device.

2Parameter tested for representative sampling.

3qCW mode: repetition rate: 0.5 KHz, pulse duration: 1 ms, duty cycle: 50%.

4Pulse mode: repetition rate: 0.5 KHz, pulse duration: 20 µs, duty cycle: 1%.

The design and specifcation of the product can be changed by LED Microsensor NT LLC. without notice
HEAD OFFICE LED Microsensor NT, LLC and RnD CENTRE Microsensor Technology, LLC
10, A, Kurchatova str., 1N, St-Petersburg, 194223, Russia; info@lmsnt.com; www.lmsnt.com

page 1 (8)Mid-Infrared (MIR) Light-Emitting Diode4.10 - 4.30 μm

Typical current-voltage characteristic (qCW3)
250

Current, mA

200
150100500-300-200-100-500100200300

400Voltage, mV
3qCW mode: repetition rate: 0.5 KHz, pulse duration: 1 ms, duty cycle: 50%.

Packages

Model

TO-18 with a cap without a glass window

Lms43LED

TO-18 with a parabolic reflector without a glass window

Lms43LED-R

TO-18 with a parabolic reflector with a glass window*

Lms43LED-RW

TO-5 with a built-in thermocooler and thermoresistor, covered by a cap with a glass window*

Lms43LED-TEM

TO-5 with a built-in thermocooler and thermoresistor, covered by a parabolic reflector with a glass window*
Lms43LED-TEM-R*Hermeticity of standard packaging is NOT tested, condensation during device operation and storage must be prevented.

Radiant characteristics (far-field pattern)
TO-18 package with a cap

1.0

20°

30°

50°
60°
70°
80°
90°
0.8

0.6 0.4

0.2

0010°

40°

20°

Relative radiant intensity

Relative radiant intensity

10°

TO-18 package with a parabolic reflector

1.0 0.8 0.6 0.4 0.2

30°

40°
50°
60°

70°
80°
90°

Related products:● Photodiodes Lms43PD, Lms49PD series - detectors of mid-infrared radiation;● LED drivers (D-41i, D-51i, minidrivers mD-1c, mD-1p ) - provide LED power supply in pulse modes.

Rev.200820

The design and specifcation of the product can be changed by LED Microsensor NT LLC. without notice
HEAD OFFICE LED Microsensor NT, LLC and RnD CENTRE Microsensor Technology, LLC
10, A, Kurchatova str., 1N, St-Petersburg, 194223, Russia; info@lmsnt.com; www.lmsnt.com

page 2 (8)Mid-Infrared (MIR) Light-Emitting Diode4.10 - 4.30 μm

To drive the LED we recommend the following basic circuit connections:
LED basic circuit connection

LED with thermoelectric module basic circuit connection

LEDPulsegenerator
1 Ohmthermocooler

I adjust
Constant current source

We recommend using Quasi Continuous Wave (qCW) mode with a duty cycle 50% or 25% to obtain maximum
average optical power and short Pulse modes to obtain maximum peak power. Hard CW (continius wave) mode is
NOT recommended.

Quasi Continuous Wave (qCW) mode

Pulse mode

31-1000 μs 31-1000 μs

max. 0.25 Af = 0.5 - 16 kHz

Drive current

Drive current

2-20 μs

Time62 - 2000 μsmax. 2 A
f = 0.5 - 16 kHz

Time

IMPORTANT CAUTIONS:●●●●

please check your connection circuit before turning on the LED;
please mind the LED polarity: anode is marked with a RED dot; REVERSE voltage applying is FORBIDDEN;
please do not connect the LED to the multimeter;
please control the CURRENT applied to the LED in order NOT to EXCEED the maximum allowable values.

Rev.200820

The design and specifcation of the product can be changed by LED Microsensor NT LLC. without notice
HEAD OFFICE LED Microsensor NT, LLC and RnD CENTRE Microsensor Technology, LLC
10, A, Kurchatova str., 1N, St-Petersburg, 194223, Russia; info@lmsnt.com; www.lmsnt.com

page 3 (8)Mid-Infrared (MIR) Light-Emitting Diode4.10 - 4.30 μm

Technical Drawings
Lms43LED

All dimensions are pointed in mm.

Rev.200820

The design and specifcation of the product can be changed by LED Microsensor NT LLC. without notice
HEAD OFFICE LED Microsensor NT, LLC and RnD CENTRE Microsensor Technology, LLC
10, A, Kurchatova str., 1N, St-Petersburg, 194223, Russia; info@lmsnt.com; www.lmsnt.com

page 4 (8)Mid-Infrared (MIR) Light-Emitting Diode4.10 - 4.30 μm

Technical Drawings
Lms43LED-R

All dimensions are pointed in mm.
Rev.200820

The design and specifcation of the product can be changed by LED Microsensor NT LLC. without notice
HEAD OFFICE LED Microsensor NT, LLC and RnD CENTRE Microsensor Technology, LLC
10, A, Kurchatova str., 1N, St-Petersburg, 194223, Russia; info@lmsnt.com; www.lmsnt.com

page 5 (8)Mid-Infrared (MIR) Light-Emitting Diode4.10 - 4.30 μm

Technical Drawings
Lms43LED-RW

All dimensions are pointed in mm.
Rev.200820

The design and specifcation of the product can be changed by LED Microsensor NT LLC. without notice
HEAD OFFICE LED Microsensor NT, LLC and RnD CENTRE Microsensor Technology, LLC
10, A, Kurchatova str., 1N, St-Petersburg, 194223, Russia; info@lmsnt.com; www.lmsnt.com

page 6 (8)Mid-Infrared (MIR) Light-Emitting Diode4.10 - 4.30 μm

Technical Drawings
Lms43LED-TEM

9,2±0,1LED chip

8,3±0,1
5±0,1

1,20,46,6±0,2

1,6±0,1on Si substrate

13,51 - TEC +2 - LED anode3 - LED cathode4 - thermistor
5 - thermistor
6 - TEC -6 pins 0,45TOP VIEW

4BOTTOM VIEW

335245266110,980,830

All dimensions are pointed in mm.

Rev.200820

The design and specifcation of the product can be changed by LED Microsensor NT LLC. without notice
HEAD OFFICE LED Microsensor NT, LLC and RnD CENTRE Microsensor Technology, LLC
10, A, Kurchatova str., 1N, St-Petersburg, 194223, Russia; info@lmsnt.com; www.lmsnt.com

page 7 (8)Mid-Infrared (MIR) Light-Emitting Diode4.10 - 4.30 μm

Technical Drawings
Lms43LED-TEM-R

15±0,2LED chip

0,4

7,2±0,2on Si substrate

13,51 - TEC +2 - LED anode3 - LED cathode4 - thermistor
5 - thermistor
6 - TEC -6 pins 0,45TOP VIEW

4BOTTOM VIEW

334252651

160,980,830

All dimensions are pointed in mm.
Rev.200820

The design and specifcation of the product can be changed by LED Microsensor NT LLC. without notice
HEAD OFFICE LED Microsensor NT, LLC and RnD CENTRE Microsensor Technology, LLC
10, A, Kurchatova str., 1N, St-Petersburg, 194223, Russia; info@lmsnt.com; www.lmsnt.com

page 8 (8)