Laser Diode Drivers

Engineers and technicians from all over the world love laser diode drivers (LDD) from Meerstetter for their precise and constant output current, as well as for temperature stability. Additionally, they benefit from fast implementation thanks to the versatile communication interfaces and the free software. Like this, our laser diode drivers serve best for high-tech applications in medicine, spectroscopy, quantum applications, fiber communication and many more.
By choosing our webshop we guarantee fast and reliable deliveries (3-8 days), low bureaucracy and direct pre- and post-sale support from our engineers. Brows our selection of high-quality laser diode drivers and find your matching device.

Jump to: LDD Comparison | Selection Guide | Features of Laser Diode Drivers | Laser Diode Driver FAQ

Laser diode drivers: Current sources for CW, modulated, QCW (& pulsed) modes


Output Current: 0-1.5 A
Output Voltage: 0-14 V

Base price:487.00 CHF
Sales price: 487.00 CHF
Total without tax:487.00 CHF
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Output Current: 0-20 A
Output Voltage: 0.5-45 V

Base price:495.00 CHF
Sales price: 495.00 CHF
Total without tax:495.00 CHF
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Output Current: 0-20 A
Output Voltage: 1-120 V

Base price:850.00 CHF
Sales price: 850.00 CHF
Total without tax:850.00 CHF
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Output Current: 0-75 A
Output Voltage: 0-70 V

Base price:1350.00 CHF
Sales price: 1350.00 CHF
Total without tax:1350.00 CHF
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Output Current: 0-15 A
Output Voltage: 0-15 V

Base price:1103.00 CHF
Sales price: 1103.00 CHF
Total without tax:1103.00 CHF
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Output Current: 0-1.5 A
Output Voltage: 0-15 V

Base price:1040.00 CHF
Sales price: 1040.00 CHF
Total without tax:1040.00 CHF
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Output Current: 0-30 A
Output Voltage: 0-27 V

Base price:1260.00 CHF
Sales price: 1260.00 CHF
Total without tax:1260.00 CHF
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Comparison of our Diode Drivers

To help you make an easy and good selection, we put together all our laser diode drivers in this comparison. Below the table you get explenations of individual terms and values.

LDD-1321 imageLDD-1321
LDD-1301 imageLDD-1301
LDD-1303 imageLDD-1303
LDD-1137 imageLDD-1137
LDD-1124 imageLDD-1124-SV
LDD-1121 imageLDD-1121-SV
LDD-1125 imageLDD-1125-HV
DC InputMax
Output Current
Output Voltage
Operation ModeCommunication
12 - 24 V 1.5 A
0 - 14 V CW USB, RS485, RS232 TTL,
10.5 - 48 V 20 A
(<0.5 %)
0.5 - 45 V 1 ms - CW CANopen (from FW v1.40),
RS485, RS232 TTL, USB
10.5 - 48 V 20 A 1 - 120 V 1 ms - CW CANopen (from FW v1.40),
RS485, RS232 TTL, USB
18 - 75 V 75 A
(<0.2 %)
0 - 70 V 0.5 µs - CW, modulated, QCW
and pulsed modes
USB, RS485, Ethernet
12 - 24 V 1.5 A
(<0.1 %)
0 - 15 V 0.3 µs - CW, modulated, QCW
and pulsed modes
RS485, USB
12 - 24 V 15 A
(<0.1 %)
0 - 15 V 0.5 µs - CW, modulated, QCW
and pulsed modes
RS485, USB
12 - 36 V 30 A
(<0.2 %)
0 - 27 V 1 µs - CW, modulated, QCW
and pulsed modes
RS485, USB

Explanation: "DC Input” defines the voltage range, you can operate the laser diode controllers with. All with DC Input range higher of at least 48 V can directly be operated with industrial power supplies. The more output current and more output voltage provided, the higher the output power. Therefore, our LDD-1137 and LDD-1303 are high-power laser drivers, the LDD-1321 is a low-power laser driver. Column “Operation Mode” gives you an idea about the applications you can use the laser diode drivers for. The column "Communication Interfaces" shows you which interfaces you can use to integrate our devices into your laser system. More detailed values of each device you can get by clicking on the device’s name.

Selection Guide

This is a product orientation guide and not a specification. Verify all data in this document with the device data sheets found at

Discover the features of Laser Diode Drivers by Meerstetter

Meerstetter laser diode drivers are known worldwide for precise and fast PID control. They serve as laser drivers for single lasers and for laser diode arrays. Our laser diode drivers don’t consist of a laser driver IC. They are well-designed constant current sources with low-noise output, integrated safety options (e.g. laser diode protection) and interfaces. The broad range of our laser drivers open the field for low-current- up to high-power applications. The versatile communication interfaces enable an easy and fast integration into your laser system.

Like this, customers from high-tech industries, research labs and medicine don’t have to design their laser driver board on their own: they use the high-performance Meerstetter OEM laser diode drivers and benefit from lower cost due to fast integration and shorten time to market.
Have we convinced you? Order the suitable laser diode driver directly in our webshop.

Features of Meerstetter Laser Diode Driver at a glance

  • High-tech OEM laser diode drivers with low noise output and high-efficiency
  • Versatile communication interfaces for a smooth and easy integration into your laser system
  • Safety features for laser diode protection, like input for temperature monitoring or fast shut down
  • Broad range of devices for low- to high-power applications
  • Free of charge pre- and postsale support
  • All our laser drivers work super-efficient with Meerstetter TEC Controllers. For a well working laser system and a even more stable laser temperature.

CW Drivers, Pulsed Laser Diode Drivers or Laser Diode Controllers suited to your needs

The LDD-112x series and the LDD-1137-PO are combined CW and pulsed laser diode drivers. The LDD-130x series devices are CW laser drivers but can also be used as pulsed laser diode drivers for pulses with longer rise times. Additionally, all of our laser diode drivers easily work together with Meerstetter TEC Controllers. This allows you to achieve a constant laser diode temperature in every application.

  • Possible applications of Meerstetter CW laser driver :
    • Material processing like laser engraving, marking or cutting
    • Seed Laser
    • Raman spectroscopy
    • Scanning microscopy
    • Weed destruction
    • Laser surgery
    • Reference light source
    • Multiple more applications in chemistry, biology, medicine and research

  • Pulsed laser diode driver from Meerstetter may be used in:
    • Metrology
    • Optical transmission/communication
    • Gas sensing (and sensing in general)
    • LiDAR
    • Liquid and solids analysis (Spectroscopy)
    • Research in general

Laser Diode Driver FAQ

Laser diode drivers (LDD) are electronic components that are necessary to drive laser diodes, similar to LEDs, with the necessary current. Depending on the application, the LDD can drive the laser diode with continuous wave (CW driver), in pulsed mode (laser diode pulse driver) or quasi continuous wave (QCW driver). For laboratory applications, table-top devices are often used. OEM devices are available for more individual solutions.
Laser diode drivers (LDD) for high-tech applications control the output current with an analogue or digital PID control circuit so that it is linear, noise-free and highly accurate. For this purpose, the LDD control circuit processes various measurement data on the driven laser diode (e.g. light intensity) with the setpoint and the existing output current in order to obtain the optimum direct current for the laser diode. Such control circuits protect the controlled laser diode from damage and ensure a highly constant laser beam.
Specifically, a Laser Diode Power Supply (or laser diode driver is a very accurate DC currant source. The circuit consists of, among other things, a switching power supply, a (PID) regulator and an output filter. The important thing is: small ripple, little interference and high efficiency. Because the development of such circuits ties up a lot of resources, manufacturers of laser systems purchase OEM LDDs. This shortens the development time and brings the final product to market more quickly.
High-quality laser driver board(s), or laser diode drivers, consist of sophisticated PID control, safety functions and interfaces. User-friendly operation is ensured by software with GUI. It takes a lot of time and manpower to develop all this. That is why it is worthwhile not to develop a laser driver board yourself and to buy an OEM laser diode driver instead.
Laser diode driver IC (or laser driver IC) are LDDs that are packed as an integrated circuit in a small package (e.g. SFF). Users therefore benefit, for example, from the smallest design, reduced power consumption and lower costs.
In contrast, a laser driver board (or OEM laser diode controller) offers more interfaces, extended software and of course more power as well as several modes such as CW and pulsed on one board.

Meerstetter Engineering: 30 Years of Excellence in Electronics for Laser Diodes and Peltier Elements

For and together with our customers we develop, manufacture, and sell laser diode drivers, which are excellent from a technical and quality standpoint, work reliably and are easy to use as well as to setup. Our laser drivers are designed towards the needs of the customer. Our hallmark is fast and competent support, excellent collaboration, and reasonably fast processing of sales. We are not low cost but offer a good package and are competitive. For example, with our matching TEC Controllers. Check out our webshop and get your quotation now.