Laser Diode Drivers

Our LDD current sources / laser diode drivers cater for a variety of applications. The drivers support different operation modi (CW, modulated, QCW, pulsed).

The latest laser diode drivers LDD-1124, LDD-1121 and LDD-1125 are members of the digital LDD-Family and feature a microcontroller and a FPGA. There is an LPC option available allowing closed-loop Laser Power Control.

The LDDs are configured and monitored by software. However, stand-alone operation is possible as well.

Our LDDs are ideally complemented with our TEC-Family precision Peltier temperature controllers.

Detailed Data
DC Input
Output Current
Output Voltage
CW Current
Output Current
Output Voltage
Duty Cycle
Pulse Rise Time
Interfaces / Inputs
Digital I/O
LDD-1124 imageLDD-1121 imageLDD-1125 image
LDD-1124-SV LDD-1121-SV LDD-1125-HV
more... more... more...
12 V – 24 V 12V – 36 V
CW Operation
up to 1.5 A, <1 ‰ Ripple up to 15 A, <1 ‰ Ripple up to 30 A, <1 ‰ Ripple
up to 15 V up to 27 V
30 µA 1 mA 2 mA
Pulse Operation
up to 1.5 A up to 15 A up to 30 A
≤ 7 V (recommended, higher voltage possible)
0 .. 100 % @ f < 10 kHz (See datasheet)
1 µs – CW
45 ns 110 ns 135 ns
120 mm x 90 mm x 18 mm
RS-485, USB, NTC for diode temperature
Pulse input, pulse output (trigger), interlock, generator trigger input
Order Process Credit Cards Accepted
High Power LED Driver featuring three individual regulators for each color to provide constant current to drive high-power RGB LEDs. Several security and configuration options.
Pre-assembled cable with connector for laser diode object temperature and laser power measurements. Compatible with LDD-1124, LDD-1121 and LDD-1125 laser diode drivers.
1U rack enclosure with HMI, intelligent cooling and modular power supply for turn-key integration and stand-alone operation of up to four internal OEM laser diode drivers or/and TEC controllers. The LTR-1200 case transforms your devices into rack-mount or table-top instruments.

Meerstetter Engineering GmbH

Schulhausgasse 12

CH-3113 Rubigen, Switzerland

+41 31 712 01 01

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